Question

What are the solutions of the system 7x + 3y = -3 and y = -2x? (-1, 0) and (0, -1) (-8, 3) and (3, -8) (-1, 0) and (-8, 3) (0, -1) and (3, -8)

Answer 1

(-3 , 6)

Explanation:

7x + 3y = -3 ---------- (I)

y = -2x --------------------(II)

Substitute y = -2x in equation (I)

7x + 3*(-2x) = -3

7x - 6x = -3

x = -3

Plugin x = -3 in equation (II)

y = -2*(-3)

y = 6