3(7.7-2X)=5(10.5-4x)

问题描述:

3(7.7-2X)=5(10.5-4x)

3(7.7-2X)=5(10.5-4x)
23.1-6x=52.5-20x
23.1-52.5=-20x+6x
-29.4=-14x
x=2.1