9y+3 = 5y+13
9y-5y = 13-3
4y = 10
y =2.5
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4y + 10 = -18 4y = -28 y = -7
5y - 2 + y + 52 = 6y + 50 - 3y6y + 50 = 9y + 50y = 0
Y-8x plus 9y equals 10y-8x.
5x-4y+9y+x-9+7 = 5x + x - 4y + 9y - 9 + 7 = 6x + 5y - 2 ■
(6x - 5y) + (-3x - 4y) =6x - 5y - 3x - 4y =3x - 9y =3 (x - 3y)