x+1=3x+1=3x+1=3
x=3-1x+1=3
x=3-1x+1=3x+1=3
x=3-1x+1=3x+1=3x+1=3x+1=3x+1=3x+1=3x+1=3x+1=3
x=3-1
x=2
x=3-1
x=2
x=3-1
x=2
x=3-1
x=2
x=3-1
x=2
x=3-1
x=2
x=3-1
x=2
x=3-1
x=2
x=2
x=3-1
x=2
x=2
x=2
x=3-1
x=2
x=3-1
x+1=3
x=3-1
x=2x=2
5x=10 —————————————————————————————————
解:x=10÷5 自己想去吧
x=2
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