※x÷4.5=18
8(x-3)=40.8
5x+1.4x=16
0.5(x+1.2)+1.5x=1
①(2.7+3)x=57
②2.85+2.5x=15.35
③15.5-5x=5.5
x+1.25＝2.1 8.4x﹣1.9x＝1.3 4（x+0.2）＝4
x-13=25 2(x+6)=58 8x-5x=3.3
