The variables in the given expression are x and y
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The equation can be solved by isolating the variables from the numbers. The answer would be 4x = 8, which equals 2.
-7x + 6 + 7x - 2 = 4
(7x - 4)(7x + 4).
The expression can be simplified to: 7x+4y
7x + y = 4y = 4 - 7x