3x - 3y = 12 ,,,, divide all equation on 3 ---> x - y = 4 .. Eq.1
4y - 8x = -16 ,,,, divide all equation on 4 ---> -2x + y = -4 .. Eq.2
by calculating the two eq. together the result will be :
x - 2x = zero
-x = zero
X = zero
Put the value of X, on Eq.1 to find the value of Y :
x - y = 4
zero - y = 4
Y = 4
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(0,-4)
2x-3y=16 Write this in standard form (y = mx+c), 3y = 2x-16 or y = 2/3x - 16/3 so the slope is 2/3
If 3y = 12, 2y = 8
5y = 3y + 12 5y - 3y = (3y - 3y) + 12 2y = 12 y = 6
4x + 3y = 12 3y = -4x + 12 y = -4/3x + 4 The slope is therefore -4/3 (the coefficient of the x term) The y intercept is 4 (the value of y when x = 0)