9x-0.9×7=2x+2.1
9x-6.3=2x+2.1
9x-2x=2.1+6.3
7x=8.4
x=8.4÷7
x=1.2
3(2x-1.2)=2(x+3.5)
6x-3.6=2x+7
6x-2x=7+3.6
4x=10.6
x=2.65
2.4x-9.8=1.4x-9
2.4x-1.4x=9.8-9
x=0.8
9x-0.9×7=2x+2.1
9x-6.3=2x+2.1
9x-2x=2.1+6.3
7x=8.4
x=8.4÷7
x=1.2
3(2x-1.2)=2(x+3.5)
6x-3.6=2x+7
6x-2x=7+3.6
4x=10.6
x=2.65
2.4x-9.8=1.4x-9
2.4x-1.4x=9.8-9
x=0.8