Solve for x
x=200
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x\times 640=\left(x-120\right)\times 800\times 2
Variable x cannot be equal to any of the values 0,120 since division by zero is not defined. Multiply both sides of the equation by x\left(x-120\right), the least common multiple of x-120,x.
x\times 640=\left(x-120\right)\times 1600
Multiply 800 and 2 to get 1600.
x\times 640=1600x-192000
Use the distributive property to multiply x-120 by 1600.
x\times 640-1600x=-192000
Subtract 1600x from both sides.
-960x=-192000
Combine x\times 640 and -1600x to get -960x.
x=\frac{-192000}{-960}
Divide both sides by -960.
x=200
Divide -192000 by -960 to get 200.
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