Solve for x
x=16
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x+16x+4x-16+4x+16=400
Multiply both sides of the equation by 4.
17x+4x-16+4x+16=400
Combine x and 16x to get 17x.
21x-16+4x+16=400
Combine 17x and 4x to get 21x.
25x-16+16=400
Combine 21x and 4x to get 25x.
25x=400
Add -16 and 16 to get 0.
x=\frac{400}{25}
Divide both sides by 25.
x=16
Divide 400 by 25 to get 16.
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