Solve for x
x=-70
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0.03x-0.9-0.05x=0.5
Subtract 0.05x from both sides.
-0.02x-0.9=0.5
Combine 0.03x and -0.05x to get -0.02x.
-0.02x=0.5+0.9
Add 0.9 to both sides.
-0.02x=1.4
Add 0.5 and 0.9 to get 1.4.
x=\frac{1.4}{-0.02}
Divide both sides by -0.02.
x=\frac{140}{-2}
Expand \frac{1.4}{-0.02} by multiplying both numerator and the denominator by 100.
x=-70
Divide 140 by -2 to get -70.
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