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If you mean y = -2x-6 then y intersect the graph at (0, -6)
Start with the first equation: 8=2x-6 so 14=2x so x=7 Now insert the answer for x into the second equation: So y=2(7)-6 so y=14-6 so y=8 So at a certain point x=7 and y=8 so a coordinate would be (7,8)
If you mean: y = x^2+4x+3 and y = 2x+6 Then the solution is: x = 1 or x = -3
14
No. If x = -2, then y = -(2x) -(+6) = -2*(-2) - 6 = +4 - 6 = -2