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a/2=a-4/30
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solve for x
cross multiply
set a proportion and cross multiply, then solve for x
a30=2a-8
I think you mean 'a' Is the equation \[\large \frac{a}{2}=\frac{a-4}{30}\] or is it \[\large \frac{a}{2}=a-\frac{4}{30}\]
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bring all a's to one side
the first one jim
30 * a = 2*(a-4) 30x = 2a - 8 28a = -8 a = -8/28 a = -2/7
k thx
how do i move the a's?
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\[\large \large \frac{a}{2}=\frac{a-4}{30}\] \[\large \large 30a=2(a-4)\] \[\large \large 30a=2a-8\] \[\large \large 30a-2a=-8\] \[\large \large 28a=-8\] \[\large \large a=-\frac{8}{28}\] \[\large \large a=-\frac{2}{7}\]
subtract 2a. so 30a=2a-8, 30a-2a=-8, 28a=-8 got that much/
thanks
-2/7 is the answer
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