Question

What is the value of x in 3x+7y=27

Answer 1

`x = (-7y)/(3) +9`

Explanation:

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

PEMDAS is the order of operation, and =

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

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First, subtract 7y from both sides:

3x + 7y (-7y) = 27 (-7y)

3x = -7y + 27

Next, divide 3 from all terms on both sides:

(3x)/3 = (-7y + 27)/3

x = (-7y/3) + 9

`x = (-7y)/(3) +9`