Question

Solve the following system of equations using elimination
5x + 15y= 0
16x + 3y = 21

Answer 1

x = 7/4

y = - 7/15

Explanation:

-5 (16x + 3y = 21) = - 80x - 15y = 105

(5x + 15y = 0) + (-80x - 15y = 105)

75x = 105

x = 105/75

x = 7/5

5(7/5) + 15y = 0

7 + 15y = 0

15y = -7

y = - 7/15