Well first all you have to do is simplifying both sides of the equation then of course isolating the variable then you should end up with

Hopefully this helps ^0^ Mark Brain
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Answer:
4
Step-by-step explanation:
Answer
Step-by-step explanation:
Even numbers are multiples of 2, and more generally, multiples arise ... An even number can be written as the sum of two equal whole numbers. ... Yet when their sum 63 is divided by 6, the remainder is 3, and is not 4 + 5 = 9. ... For example, in the case above of 4 and 6, one common multiple is 4 × 6 = 24, but their lowest ...
So try to get the x term to one side by itself
add 21 to both siede
3x+28=5x
subtract 3 x from both sides
28=2x
divide 2
14=x