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OpenStudy (anonymous):
1/4+4x/5=11/20
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OpenStudy (anonymous):
Multiply the whole equation through by 20 and you get 5+16x=20. 16x=15. X=15/16.
OpenStudy (anonymous):
My bad, 5+16x=11
OpenStudy (anonymous):
x=3/8
OpenStudy (anonymous):
why multiply?
OpenStudy (anonymous):
It's better than finding common denominators, which takes a long time, and since you multiply both sides of the equation by the same thing the equation remains true.
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