3(x+6)=9—5(1—2x)解:3x+18=9-5+10x18-9+5=10X-3X14=7xx=2
3(x+6)=9-5(1-2x)3x+18=9-5+10x3x+18=4+10x14=7xx=2
3x+18=9-5+10x 14=7xx=2
x=2
看图