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30-1.5x+\left(30+1.5x\right)\times 1.2=69
Use the distributive property to multiply 20-x by 1.5.
30-1.5x+36+1.8x=69
Use the distributive property to multiply 30+1.5x by 1.2.
66-1.5x+1.8x=69
Add 30 and 36 to get 66.
66+0.3x=69
Combine -1.5x and 1.8x to get 0.3x.
0.3x=69-66
Subtract 66 from both sides.
0.3x=3
Subtract 66 from 69 to get 3.
x=\frac{3}{0.3}
Divide both sides by 0.3.
x=\frac{30}{3}
Expand \frac{3}{0.3} by multiplying both numerator and the denominator by 10.
x=10
Divide 30 by 3 to get 10.