40tristanhanson 40tristanhanson
  • 15-01-2020
  • Mathematics
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-16=-3(7a+8) what is a

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Аноним Аноним
  • 15-01-2020

-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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