Solve for x
x=50
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x\times 4=40\times 5
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 40x, the least common multiple of 40,x.
x\times 4=200
Multiply 40 and 5 to get 200.
x=\frac{200}{4}
Divide both sides by 4.
x=50
Divide 200 by 4 to get 50.
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