The denominator of a fraction exceeds by 4 from the numerator if we increase both by 3 the fraction become 4/3 what will be the original fraction
original fraction: x/(x+4)
new fraction = (x+3)/(x+7)
(x+3)/(x+7) = 3/4
4(x+3) = 3(x+7)
solve for x, and sub back into original fraction