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3 years ago

Solve -np-80<60 for n. Show your work. Solve 2a-5d=30 for d. Show your work.

Mathematics

1 answer:

xz_007 [3.2K]3 years ago

8 0

$-np-80 < 60\qquad\text{change the signs}\\\\np+80$

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$2a-5d=30\qquad\text{subtract 2a from both sides}\\\\-5d=-2a+30\qquad\text{change the signs}\\\\5d=2a-30\qquad\text{divide both sides by 5}\\\\d=0.4a-6$

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