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Mathematics 18 Online
OpenStudy (anonymous):

a/2=a-4/30

OpenStudy (anonymous):

solve for x

OpenStudy (anonymous):

cross multiply

OpenStudy (anonymous):

set a proportion and cross multiply, then solve for x

OpenStudy (anonymous):

a30=2a-8

jimthompson5910 (jim_thompson5910):

I think you mean 'a' Is the equation \[\large \frac{a}{2}=\frac{a-4}{30}\] or is it \[\large \frac{a}{2}=a-\frac{4}{30}\]

OpenStudy (anonymous):

bring all a's to one side

OpenStudy (anonymous):

the first one jim

OpenStudy (anonymous):

30 * a = 2*(a-4) 30x = 2a - 8 28a = -8 a = -8/28 a = -2/7

jimthompson5910 (jim_thompson5910):

k thx

OpenStudy (anonymous):

how do i move the a's?

jimthompson5910 (jim_thompson5910):

\[\large \large \frac{a}{2}=\frac{a-4}{30}\] \[\large \large 30a=2(a-4)\] \[\large \large 30a=2a-8\] \[\large \large 30a-2a=-8\] \[\large \large 28a=-8\] \[\large \large a=-\frac{8}{28}\] \[\large \large a=-\frac{2}{7}\]

OpenStudy (anonymous):

subtract 2a. so 30a=2a-8, 30a-2a=-8, 28a=-8 got that much/

OpenStudy (anonymous):

thanks

OpenStudy (anonymous):

-2/7 is the answer

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