②27x-x=78
③6x +5x =27.5
④15 x÷4=45
⑤5×1.4+4x=23
⑥8x-0.6×50=50
①20+x=35 ②3x+6x=81 ③8x-24=80
2x+5.4=18.9 2x-2.8=9.96 (x-0.8)×4=7.2
2x+5=17 3(x-2)=12
① ② ③
⑴6x-9=33 ⑵y+3y=28.4