2x+5=17 3(x-2)=12
①4x+4.8=20
②5(x+0.4)=5
③3(x-2.4)÷5=1.8
④0.3×2.8+1.5x=3.6x
x+18-25=43 27x+31x=145 7x-16×4=27
6×0.8+7x=19.5 x-0.8x=10 3.6x÷2=2.16
x÷0.2=7.2 △2x-3.42=6.4
138-x=57 4x+6x=18