Solve for x
x=-3
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0.5x+0.4-1.4x=3.1
Subtract 1.4x from both sides.
-0.9x+0.4=3.1
Combine 0.5x and -1.4x to get -0.9x.
-0.9x=3.1-0.4
Subtract 0.4 from both sides.
-0.9x=2.7
Subtract 0.4 from 3.1 to get 2.7.
x=\frac{2.7}{-0.9}
Divide both sides by -0.9.
x=\frac{27}{-9}
Expand \frac{2.7}{-0.9} by multiplying both numerator and the denominator by 10.
x=-3
Divide 27 by -9 to get -3.
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