3 years ago

-16=-3(7a+8) what is a

Mathematics

1 answer:

user100 [1]3 years ago

6 0

-16=-3(7a+8)

multiply the bracket by -3

(-3)(7)=-21

(-3)(80=-24

-16=-21a-24

move -24 to the other side

sign changes from -24 to +24

-16+24=-21a-24+24

8=-21a

divide both sides by -21 to get a by itself

8/-21=-21a/-21

answer:

a=-8/21

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