Question 683910
-2x = 8y+18


x = (8y+18)/(-2)


x = (8y)/(-2)+18/(-2)


x = -4y - 9



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-33 = 7y-4x


-33 = 7y-4(-4y-9)


-33 = 7y+16y+36


-33 = 23y+36


I'll let you finish. Once you have found the value of y, use it to find the value of x.