If 3x / 4 = 7 - x / 3, then x = what?
\(\frac{3x}{4} = 7-\frac{x}{3}\)\(\frac{3x*3}{4*3} = \frac{7*12}{12} -\frac{x*4}{3*4}\)\(\frac{9x}{12} = \frac{84}{12} -\frac{4x}{12}\)\(12*( \frac{9x}{12} = \frac{84}{12} -\frac{4x}{12} )\)\(9x=84-4x\)\(13x=84\)\(84/13\)
