9y
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It equals x+5y simplified
2a - 4y = 3a - 8a - 5y 7a = -ya = -(y/7)
They are: x = -2 and y = -1.
x + y = 10. Substitute x = 4y into this equation: 4y + y = 10 Combine like ters: 5y = 10 Divide through by 5: y = 2 Substitute this value of y in x = 4y ie x = 4*2 = 8.
One linear equation in two variables (x and y) cannot be solved.