Solve for x
x=40
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4\times 30=3x
Multiply both sides of the equation by 300, the least common multiple of 75,100.
120=3x
Multiply 4 and 30 to get 120.
3x=120
Swap sides so that all variable terms are on the left hand side.
x=\frac{120}{3}
Divide both sides by 3.
x=40
Divide 120 by 3 to get 40.
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