Solve for x
x=-4
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1.3x-0.7-2.1x=2.5
Subtract 2.1x from both sides.
-0.8x-0.7=2.5
Combine 1.3x and -2.1x to get -0.8x.
-0.8x=2.5+0.7
Add 0.7 to both sides.
-0.8x=3.2
Add 2.5 and 0.7 to get 3.2.
x=\frac{3.2}{-0.8}
Divide both sides by -0.8.
x=\frac{32}{-8}
Expand \frac{3.2}{-0.8} by multiplying both numerator and the denominator by 10.
x=-4
Divide 32 by -8 to get -4.
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