\[5x-7=3\]

1
Add 77 to both sides.
5x=3+75x=3+7

2
Simplify  3+73+7  to  1010.
5x=105x=10

3
Divide both sides by 55.
x=105x=\frac{10}{5}

4
Simplify  105\frac{10}{5}  to  22.
x=2x=2

Done

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