10
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x = 0
x+4x+5 = 0 5x + 5 = 0 5x = -5 x = -1
x2 + 5x + 6 = 0 (x + 3)(x + 2) = 0 So x + 3 = 0 or x + 2 = 0 So x = -3 or x = -2
Set it equal to 0 and subtract x and solve for y
If: x+7-4x+1 = -10 Then: 8-3x = -10 And: -3x = -10-8 => -3x = -18 So: x = -18/-3 => x = 6