3(x-2)=5(2x+3)
3x-6=10x+15
7x=21
x=3
2(0.3x-4)-5(0.2x+3)=9
0.6x-8-x-15=9
-0.4x=32
x=-80
2分之x-7=5+x
x/2 -x=5+7
-3x/2=12
x=-12 X 2/3
x=-8