Question

Sovle for x. 2x + 6 = - r - 15

Answer 1

`x = (-r - 21)/(2)`

Explanation:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Remember to do the opposite of PEMDAS.

PEMDAS =

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

First, subtract 6 from both sides:

2x + 6 (-6) = -r - 15 (-6)

2x = -r + (-15 - 6)

2x = -r + (-21)

2x = - r - 21

Next, divide 2 from both sides:

`(2x)/(2) = (-r - 21)/(2)`

`x = (-r - 21)/(2)`

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