12+3(y)
12+ 3(-3)
12 + {3x (-3)}
12+ (-9)
12-9
3
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x = 3 and y = 0
2x + 3y = 12 x = 1.45, so 2 * 1.45 + 3y = 12 2.9 + 3y = 12 3y = 12 - 2.9 = 9.1 y = 9.1/3 = 3.0333... or 91/30 or 3 1/30.
The slope is -1. 3x+3y=12 Subtract 3x 3y=-3x+12 Divide by 3 y=-x+4
x = 3 and y = 2
7y = 3y - 12 4y = -12 y = -3