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15+0.3x-4.5=0.6x
Use the distributive property to multiply 0.3 by x-15.
10.5+0.3x=0.6x
Subtract 4.5 from 15 to get 10.5.
10.5+0.3x-0.6x=0
Subtract 0.6x from both sides.
10.5-0.3x=0
Combine 0.3x and -0.6x to get -0.3x.
-0.3x=-10.5
Subtract 10.5 from both sides. Anything subtracted from zero gives its negation.
x=\frac{-10.5}{-0.3}
Divide both sides by -0.3.
x=\frac{-105}{-3}
Expand \frac{-10.5}{-0.3} by multiplying both numerator and the denominator by 10.
x=35
Divide -105 by -3 to get 35.