①1.4x=70
②7x+36=78
③3.5x+0.2×7=2.1
④x+11x=300
①0.6+x=2.7
②13x-7x=5.7
③95×3+3x=540
④x÷2.5=5
⑤x+8-12=280
⑥9x-6.2=10
①5x-4×6=56
②4x+1.2=2.8
③
④x:10=10.8:6
⑤
⑥(1-55%)x=90