n=3,y=4
2(n+3y)=30
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Solve for y.2x - 3y = 52x - 2x - 3y = -2x + 5-3y = -2x + 5-3y/-3 = -2x/-3 + 5/-3y = (2/3)x - 3/5Clearly you see that the slope is 2/3.
Collect like terms: 2x + 3y + 3y - 5 - 6 2x + 6y - 11
3y + 2y + 4 + 1 = 805y + 5 = 805y = 75y = 15
y=5
3y+5=y-25 2y=-30 y= -15