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The allowable operations which will produce an equivalent equation are
In the equation \[4x + 28 = 2^3\] I first want to eliminate the $28$ from the left side. To do so I add $28$ to both sides of the equation. This yields \[4x + 28  28 = 2^3  28\] Since $2^3 = 8$ this simplifies to \[4x = 20\] All that remains is to remove the 4 coefficient and to do this I will multiply both sides by $\large \frac14 .$ The result is \[\frac14 \times 4x = \frac14 \times 20\] which simplifies to \[x = 5.\] Now try your equation. Penny  


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