x + 3 = 5
x = 5 - 3
x = 2
x-7=-5
x=-5+7
x=2
0=2-x
x/4=1/2 /*4
2x=2+x
2x-x=2
4x=2+3x
4x-3x=2
x/2=1 /*2
2x=4 /:2
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x + 3 = 5
x = 5 - 3
x = 2
x-7=-5
x=-5+7
x=2
0=2-x
x = 2
x/4=1/2 /*4
x = 2
2x=2+x
2x-x=2
x=2
4x=2+3x
4x-3x=2
x=2
x/2=1 /*2
x = 2
2x=4 /:2
x=2