2.7÷x=3 7×7-3x=40 x-0.85x=3
6(x-3)=24 5(3x+8)=40 (16-2x)÷3=0.4
1.8×15-1.7x=13.4 2(x+6)=13.6 4.2x-x=1.28
15-2x=12.9 9x+6x=4.8
4.2-x=2.5 2(x+14)=46
☆4.8÷(x+3)=1.2 0.3x+1.5x=1.98
①6x+18=48 ②12.3x-7.5x=57.6
③7(x-25.7)=58.1 ④x÷0.7=4.2
① (x-3)÷4=20
②3x-1.4=22.6
③9x+5x=8.4
④(x+4.5)×2 =23