7y+3=y+18 Subtract three 7y=y+15 Subtract y 6y=15 Divide Y=15/6 That's your fraction if you need a decimal just type it in the calculator...
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21-7y+3x-xy7(3-y)+x(3-y)
5x + 3 = 18 Subtract 3 from both sides: 5x = 15 Divide by 5: x = 3.
2x(y - 3) + 7(y - 3) = (2x + 7)(y - 3)
y-intercept = 3y-intercept ; x = 07y + 3x - 21 = 07y + 3(0) -21 = 07y -21 = 07y = 217y/7 = 21/7y=3