\[28=k\times \frac{56}{4}\]
1
Simplify  k×564k\times \frac{56}{4}  to  14k14k.
28=14k28=14k

2
Divide both sides by 1414.
2814=k\frac{28}{14}=k

3
Simplify  2814\frac{28}{14}  to  22.
2=k2=k

4
Switch sides.
k=2k=2

Done

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