Question

Ifx=4y+3andy=–2x–3 what is the value of xy?

Answer 1

1

Explanation:

x = 4y + 3

y = -2x - 3

(I'm going to substitute the value of x into the 2nd equation)

y = -2(4y + 3) - 3 = -8y - 6 - 3 = -8y - 9

9y = -9, y = -1

x = 4(-1) + 3 = -4 + 3 = -1

xy = (-1) * (-1) = 1

hope this helps! <3