Solve for x
x=-\frac{2}{3}\approx -0.666666667
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-x+21+1=-10x+15+1
Combine 3x and -4x to get -x.
-x+22=-10x+15+1
Add 21 and 1 to get 22.
-x+22=-10x+16
Add 15 and 1 to get 16.
-x+22+10x=16
Add 10x to both sides.
9x+22=16
Combine -x and 10x to get 9x.
9x=16-22
Subtract 22 from both sides.
9x=-6
Subtract 22 from 16 to get -6.
x=\frac{-6}{9}
Divide both sides by 9.
x=-\frac{2}{3}
Reduce the fraction \frac{-6}{9} to lowest terms by extracting and canceling out 3.
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