imnotsmart72 imnotsmart72

26-08-2022
Mathematics

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YOU BE THE TEACHER Your friend solves the equation. Is your friend correct?
Explain your reasoning.
21.
-2(7-y)+4=-4
-14-2y+4=-4
<-10-2y=-4
-2y=6
y=-3
22.
3(y-1)+8=11
3y-3+8=11
3y+5=11
3y=6
y=2

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