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3x - y = 4
y = -3x + 4
To find y-intercept, set x = 0 in the above equation to get y = 4
y - 4 = 9 y - 4 + 4 = 9 + 4 y = 13
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y increased by 4 is written as: y + 4
y + 2y = 4 (2+1)y = 4 3y = 4 (3y)/3 = 4/3 y = 4/3 = 1.3333333333333333333
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