23-03-2017
Mathematics

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i forgot how to do this. -2(21+2y/5)+y=-8

Find y.

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rarrininger rarrininger

23-03-2017

-2(21+2y/5)+y=-8

-42-4y/5+y= -8
-42-4y+5y/5=-8
-42+y/5=-8
-5*42+5*y/5=-5*8
-210+y=-40
y=-40+210
y= 170

Check

-2(21+2(170)/5)+170=-8

-2(21+340/5)+170=-8

-2(21+68)+170=-8
-2(89)+170= -8
-178 +170 = -8
-8 = -8

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