-3x + 6 = 12
Subtract 6 from each side:
-3x = 6
Divide each side by -3:
x = -2
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3x + 2 = 3x + 6 This is not possible.
-3x + 2y = 12-3x + 3x + 2y = 3x + 122y = 3x + 122y/2 = 3x/2 + 12/2y = (3/2)x + 6
Multiply first equation by 1.5, giving 3x + 3y = 12, but we are told that 3x + 3y = 6. If there isn't an error in the question then 2 = 1!
4x2+3x+6+5x+3x+6 = 4x2+11x+12 when simplified
If: -3x+2y = 12 Then: y = 1.5x+6 in slope-intercept form