Question

Which of the following ordered pairs is a solution of the given system of

linear equations?
(4x + 8y = 8
x + 3y = 13

Answer 1

x=-14 and y = 9

Explanation:

hello

4x + 8y = 8 <=> divide by 4 both parts

(1) x + 2y = 4

(2) x + 3y = 13

(2) - (1) gives

x + 3y -x - 2y = 13 - 4 = 9

<=> y = 9

we replace in (1) x + 2*9 = 4

<=> x = 4 - 18 = -14

so x = -14

hope this helps