+6250 \(5 - \dfrac 3 4 x = \dfrac 3 8\\ \text{multiply both sides by }8\\ 40 - 6x = 3\)
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+118689 Yes for addition or subtraction.
BUT only if there are just numbers on the bottom - you have to be more careful if there are pronumerals (letters)
Multiply both sides of the equation but the smallest common denominator.
2/3x +4=2/5
\(\frac{2}{3}x+4=\frac{2}{5}\\ \frac{2x}{3}+4=\frac{2}{5}\\ \text{The lowest common denominator is 3*5=15}\\ 15[\frac{2x}{3}+4]=15*\frac{2}{5}\\ [\frac{15*2x}{3}+15*4]=\frac{15*2}{5}\\ \frac{5*2x}{1}+60=\frac{3*2}{1}\\ 10x+60=6 \)
