6x - 2y = -10
Plug in 4 for y because you are given (x, y) --> (x, 4).
6x - 2(4) = -10
Multiply 2 * 4.
6x - 8 = -10
Add 8 to both sides.
6x = -2
Divide both sides by 6.
x = -2/6 = -1/3
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