\[56=-48-8y\]

1
Add 4848 to both sides.
56+48=8y56+48=-8y

2
Simplify  56+4856+48  to  104104.
104=8y104=-8y

3
Divide both sides by 8-8.
1048=y-\frac{104}{8}=y

4
Simplify  1048\frac{104}{8}  to  1313.
13=y-13=y

5
Switch sides.
y=13y=-13

Done

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