2乘以括号0.5x加1.2括号等于4x

问题描述:

2乘以括号0.5x加1.2括号等于4x

2(0.5x+1.2)=4x
0.5x+1.2=2x
2x-0.5x=1.2
1.5x=1.2
x=0.8