Solve for x

X=20-y
7x-8=y

x= 3.5

Step-by-step explanation:

Substitute the variable x with what it's equal to, x= 20-y

7(20-y)-8= y

Distribute into the parenthesis.

140-7y-8= y

Subtract common numbers.

(140-8)-7y= y

132-7y= y

Move the constant to the right.

132-7y= y

-132        -132

-7y= y-132

Subtract y to both sides.

-7y= y-132

-y    -y

-8y= -132

Divide to both sides by -8

-8y= -132

-8      -8

y= 16.5

Now, add the y value to the equation.

x= 20- (16.5)

x= 3.5

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