Question

Which number should each side of the equation 34x=9 be multiplied by to produce the equivalent equation of x = 12?

Answer 1

There exists no number that could make x=12.  Simply because x does not =12, but x = 9/34

Answer 2

3/4x = 9....multiply both sides by 4/3...eliminating the 3/4 on the left side
x = 9 * 4/3
x = 36/3
x = 12