If 12x 14 2 what is x

Insert numbers in a term

Calculate the value of the term for $$ x = 1 $$.

$$ 4 * (x + 2) $$


To do this, you use for the value.

$$4*($$ $$+$$ $$2)$$



Now you can calculate the term. Always turn the Priority rules at.

$$4*($$ $$+$$ $$2)$$

$$=4*3$$

$$=12$$

Terms are meaningful combinations of numbers, variables and arithmetic symbols.

Examples:

$$(5+3)$$

$$ x + 3 $$

$$1/2$$

$$ - 2 * x $$

Priority rules:

  1. Always brackets first
  2. Point before line calculation
  3. calculate from left to right

Calculate terms for multiple values

For different values ​​you calculate the term one after the other.


Calculate the values ​​of the term for $$ x = $$,, and.

$$ 3 * x-4 $$


$$ x = $$: $$ x = $$:

$$3*$$ $$-$$ $$4$$                   $$3*$$ $$-$$ $$4$$

$$=2$$                       $$=8$$

$$ x = $$: $$ x = $$:

$$3*$$ $$-$$ $$4$$                   $$3*$$ $$-$$ $$4$$

$$=23$$                     $$=14$$

At four You set values four times a number for $$ x $$ and do the math four times out.

Calculate terms for negative numbers

You can also use $$ 0 $$ or negative numbers for $$ x $$.


Calculate the values ​​of the term for $$ x = $$,, and.

$$ (x + 2) * 3 $$


$$ x = $$: $$ x = $$:

$$($$ $$+$$ $$2)*3$$                 $$($$ $$+$$ $$2)*3$$

$$=6$$                       $$=3$$


Make sure you are really counting on the negative number when asked.


$$ x = $$: $$ x = $$:

$$($$ $$+$$ $$2)*3$$                 $$($$ $$+$$ $$2)*3$$

$$=-6$$                     $$=18$$

Negative numbers do not automatically mean that the result is negative.

The results can be very different if, for example, you calculate with $$ 4 $$ instead of $$ - 4 $$.

kapiert.decan do more:

  • interactive exercises
    and tests
  • individual classwork trainer
  • Learning manager

Share by $$ 0 $$?

You can't divide by zero when calculating terms either. Dividing by zero is not possible.

Example 1: Calculate the value of the term for $$ x = 0 $$.

$$ (2: x) * 3 $$

$$(2:$$ $$)*3$$

not solvable

You cannot calculate the term for $$ x = 0 $$. You can calculate it for all other numbers.

Example 2: Substitute $$ 2 $$ and $$ - 2 $$ for $$ x $$ and calculate the term.

$$ 4: (2 + x) $$

for $$ x = -2 $$ for $$ x = 2 $$

$$4:(2+(-2))$$                   $$4:(2+2)$$

$$=4:$$                           $$=4:4$$

not solvable                       $$=1$$

You cannot calculate the term for $$ x = -2 $$. For all other values ​​(example $$ x = 2 $$) it works anyway.

When you encounter dividing by zero, write not solvable to your account.

A variable can appear several times in a term

If a variable occurs more than once in a term, put $$ x $$ in each the same value a.

Calculate the value of the term for $$ x = $$ and $$ x = $$.

$$ 4 * x + x $$

For $$ x = 2 $$:

$$4*$$ $$+$$ $$=10$$

For $$ x = 3 $$:

$$4*$$ $$+$$ $$=15$$

Even if you are supposed to use several different values ​​for x, you can only ever use the same number.

Wrong: $$ 4 * x + x $$ $$ rarr $$  4 · 2 +3 

Different variables can be in one term

Terms can have multiple variables.

Calculate the value of the term for and.

$$+$$ $$2*$$

For and :

$$+$$ $$2*$$

$$=3+4$$

$$=7$$

Don't swap the values ​​and the variables. If you use the $$ y $$ value for the $$ x $$ value, it usually gives a different result.

Wrong: $$ 2 + 2 * 3 = 8 $$

kapiert.decan do more:

  • interactive exercises
    and tests
  • individual classwork trainer
  • Learning manager