Question

У = 2х
3х + Зу = -18

Answer 1

y = -4

x = -2

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Explanation:

y = 2x

y÷2 = x

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so,

3x + 3y = -18

3(y÷2) + 3y = -18

3y ÷2 + 3y = -18

( 3y + 6y )÷2 = -18

9y ÷2 = -18

9y = -18 ×2

9y = -36

y = -4

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x = y÷2

x = -4÷2

x = -2

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Answer 2

x=-2,y=-4

Explanation:

Substuting the value of y in second equation.

3x+3×2x=-18

9x=-18

x=-2

putting the value of x in equation 1 ,

y=-4