3*1/3y = 3*1/3y = 1/y
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3y2 y x y = y2 3 x y2 = 3y2
3(10-3y) = 30 - 9y
x - 3y = 11 So x = 11 + 3y Then, by the other equation, 4x + 3y = -1 becaomes 4(11+3y) + 3y = -1 or 44 + 12y + 3y = -1 or 15y = -45 so that y = -3
If: -4x+3y = 1 Then: 3y = 4x+1 And: y = 4/3x+1/3 which is now in slope-intercept form
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