Solve for x
x=\frac{5}{7}\approx 0.714285714
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30x-30-20x+40=15x-45-12x+60
Multiply both sides of the equation by 60, the least common multiple of 2,3,4,5.
10x-30+40=15x-45-12x+60
Combine 30x and -20x to get 10x.
10x+10=15x-45-12x+60
Add -30 and 40 to get 10.
10x+10=3x-45+60
Combine 15x and -12x to get 3x.
10x+10=3x+15
Add -45 and 60 to get 15.
10x+10-3x=15
Subtract 3x from both sides.
7x+10=15
Combine 10x and -3x to get 7x.
7x=15-10
Subtract 10 from both sides.
7x=5
Subtract 10 from 15 to get 5.
x=\frac{5}{7}
Divide both sides by 7.
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