y = 8
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The equation for 3y + 3y = -1 is 3y + 3y = -1.
(5, 1)
a) 4x+13y=40 b) 4x+3y=-40c) multiply b per(-1)=-4x-3y-40d) sum a and c: 4x+13y-4x-3y=40-(-40)=>10y=80 => y=8to find x replace y per its value in a or b and get x=-16
5y-2y= 3y+2 5y-2y-3y= 2 0y= 2
2x+3y=13 3x-y=3 x=2