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Mathematics 13 Online
OpenStudy (liv33):

Solve for x: 17 = -13 - 8x

geerky42 (geerky42):

Try add both sides by 13 then divide both sides by -8.

jimthompson5910 (jim_thompson5910):

again you're following PEMDAS in reverse undo the subtraction first, then undo the multiplication next

OpenStudy (liv33):

30 = -8x

OpenStudy (liv33):

22 = -1x

jimthompson5910 (jim_thompson5910):

-8x means -8 times x

jimthompson5910 (jim_thompson5910):

you do not subtract 8 from both sides to go from 30 to 22

TheSmartOne (thesmartone):

-8 times x, like Jim said. To get x away from the -8, we have to do the opposite of multiplication.

OpenStudy (liv33):

So -8/-8 ?

OpenStudy (liv33):

I don't understand

TheSmartOne (thesmartone):

yes, and do that to the other side too

OpenStudy (liv33):

9 = -13 - x ?

TheSmartOne (thesmartone):

30 = -8x we need to do the opposite of multiplication to -8 on both sides so we can isolate x. You correctly identified dividing. We need to divide both sides by -8 to isolate x and get the final answer :)

jimthompson5910 (jim_thompson5910):

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OpenStudy (liv33):

So... 22 = x ?

jimthompson5910 (jim_thompson5910):

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