7x-12%=5.8
7x=2.8+1.2
7x=4
x=4/7
25+75%x=32.5
0.75x=32.5-25
0.75x=7.5
x=10
80%x-46%x=10.2
0.34x=10.2
x=10.2÷0.34
x=30