8x+2x=10
(8+2)x=10
10x=10
10x/10=10/10
x=1
8x+2x=31.4
10X=31.4
X=31.4÷10=3.14
8x+2x=31.4
10x=31.4
x=3.14
8x+2x*4=48
8x+8x=48
16x=48
x=48÷16
x=3
8x-2x=30
x=5
6x+x=35
x=5
10x=12.1 x=12.1/10=1.21
解:10x=31.4
x=3.14
解:8x+2x=3.4
10x=3.4
x=0.34
8x+2x=31.4
10x=31.4
x=31.4÷10
x=3.14