6x7=56x-7=5

1
Add 77 to both sides.
6x=5+76x=5+7

2
Simplify  5+75+7  to  1212.
6x=126x=12

3
Divide both sides by 66.
x=126x=\frac{12}{6}

4
Simplify  126\frac{12}{6}  to  22.
x=2x=2

Done

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