First we're gonna convert these fractions into fractions with a common decimal.
x + 4/7 = 3/8
4/7 = 32/56
4 * 8 = 32
7 * 8 = 56
3/8 = 21/56
3 * 7 = 21
8 * 7 = 56
Now we have x + 32/56 = 21/56
Subtract both sides by 32/56
x = -11/56
x+32/56 =21/56
x=-11/56
It does not need reduced
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