Hey!
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Steps To Solve:
20 + 4x = 28
~Subtract 20 to both sides
20 + 4x - 20 = 28 - 20
~Simplify
4x = 8
~Divide 4 to both sides
4x/4 = 8/4
~Simplify
x = 2
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Hence, the answer is
![\Large\boxed{\mathsf{x~=~2}}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/da25e65fbfa1vwb7haegc7gsnkj51fjpeu.png)
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Hope This Helped! Good Luck!