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katrin [286]
3 years ago
12

Describe how to model -3x + 7 = 28

Mathematics
2 answers:
maria [59]3 years ago
4 0
To model -3x + 7 = 28, you have to find the additive inverse of 7. Since -7 is the additive inverse of 7, you subtract both sides by -7 and you bring down -3x and the = sign. Make sure you draw a long line beneath the equation. Cross out the -7 and 7. So 28 - 7 is 21. Next is to find the multiplicative inverse of -3x. So -3x = 21 is -7. Before that, you divide both sides by 3 and cancel out the -3x/3. Bring down x and = and your answer is -7. x = -7
erastova [34]3 years ago
3 0
AWell the answer is -7
you minus 28 from 7 and get 21. so divide 21 by -3 and you get -7.
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