\[3x-2=7\]
1
Add 22 to both sides.
3x=7+23x=7+2

2
Simplify  7+27+2  to  99.
3x=93x=9

3
Divide both sides by 33.
x=93x=\frac{9}{3}

4
Simplify  93\frac{9}{3}  to  33.
x=3x=3

Done

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