Question

解方程：x除以7+3*0.9=4,3（0.72-x+1)=4.8

Answer 1

x/7+3*0.9=4 x=(4-3*0.9)*7=1.3*7=9.1

3（0.72-x+1)=4.8 1.72-x=4.8/3=1.6 x=1.72-1.6=0.12