Solve for x
x=-3.1
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-3x-4.2=5.1
Swap sides so that all variable terms are on the left hand side.
-3x=5.1+4.2
Add 4.2 to both sides.
-3x=9.3
Add 5.1 and 4.2 to get 9.3.
x=\frac{9.3}{-3}
Divide both sides by -3.
x=\frac{93}{-30}
Expand \frac{9.3}{-3} by multiplying both numerator and the denominator by 10.
x=-\frac{31}{10}
Reduce the fraction \frac{93}{-30} to lowest terms by extracting and canceling out 3.
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