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Mathematics 21 Online
OpenStudy (anonymous):

Choose the replacement for x that makes the equation a true statement. -4x + 88 = -12

jimthompson5910 (jim_thompson5910):

Start off by subtracting 88 from both sides

OpenStudy (anonymous):

done

jimthompson5910 (jim_thompson5910):

what do you get

OpenStudy (anonymous):

-92 and -100

jimthompson5910 (jim_thompson5910):

88 - 88 = 0, so the 88 goes away on the left side

jimthompson5910 (jim_thompson5910):

-12 - 88 = -100 So we then get -4x = -100

jimthompson5910 (jim_thompson5910):

now divide both sides by -4 to completely isolate x

OpenStudy (anonymous):

-4 and 100??????/

jimthompson5910 (jim_thompson5910):

-4 divided by -4 = ???

OpenStudy (anonymous):

1

jimthompson5910 (jim_thompson5910):

so -4x becomes 1x or just x on the left side

jimthompson5910 (jim_thompson5910):

-100 divided by -4 = ???

OpenStudy (anonymous):

25

jimthompson5910 (jim_thompson5910):

so the answer is x = 25

OpenStudy (anonymous):

thanks!

jimthompson5910 (jim_thompson5910):

np

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