Mathematics
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I am doing some algebra homework and we are solving equations by expanding brackets. I was going along fine with the positive numbers however I am a bit stuck on these negative ones... -(6-7)=2 -10(s+1)=-87 Appreciate it if you can help me solve these!

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(2) Answers
gillisshannon

-10(s + 1) = -87  The same way you do positive numbers, you do negative number. Multiply whatever is in the parenthesis by what's on the outside, which in this case is -10. So:  -10*s + -10*1 = -87  -10s + -10 = -87 To solve, first add -10 to both sides -10s = -77  next, divide both sides by -10 s = 7.7  To check the answer, plug the solution into the original equation -10(s+1) = -87 -10(7.7 + 1) = -87 -10(8.7) = -87 -87 = -87  (for the first one, is there a variable involved?)

kingavisingh

The first one is incomplete. [latex] -10(s+1)=-87\\ -10s-10=-87\\ -10s=-77\\ s=7.7[/latex]

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