4(x+3.9)=25.2
0.8x-7.8=1.4
3.2÷0.8+0.3x=25
x+36=78 4 - x = 1.2 (100-3x)÷2 =38
5.2-0.2x=2.6
9(x-3)=63
6.2x+x=11+3.4
7÷x=3.5