3/4x=12
Multiply each side by 4/3.
3/4*4/3x=12(4/3)
Cross out 3 and 3, divide by 3 and becomes 1.
Cross out 4 and 4, divide by 4 and becomes 1.
1*1*x=x
Cross out 12 and 3, divide by 3.
12/3=4
3/3=1
4*4=16
Answer: 16
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