Explanation:
We can solve for x-y by isolating the term on one side of the equation and simplifying:
5(x-y) + 4 = 7
5(x-y) = 7 - 4
5(x-y) = 3
Next, we can divide both sides by 5:
x - y = 3/5
Therefore, the value of x-y is 3/5.
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