Solve for x
x=4
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21x-15=24x+53-20x
Combine 16x and 5x to get 21x.
21x-15=4x+53
Combine 24x and -20x to get 4x.
21x-15-4x=53
Subtract 4x from both sides.
17x-15=53
Combine 21x and -4x to get 17x.
17x=53+15
Add 15 to both sides.
17x=68
Add 53 and 15 to get 68.
x=\frac{68}{17}
Divide both sides by 17.
x=4
Divide 68 by 17 to get 4.
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