5(6 + y)
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2y^2+5y+2=(2y+1)(y+2)
(x + 5y)(x + 7y)
Y=30
It is y = -7
The question is not quite clear, do you mean -6x+3y = -18 and -10+5y = -30? If so then the solution is: -10+5y= -30 5y = -30+10 5y = -20 y = -4 Substitute the value of y into the equation -6x+3y = -18: Answer: x = 1 and y = -4