Question

Solve the system of equation — 3х + бу = 9
5х + 7y = -49

Answer 1

y = 64/3

x = -119/3

Explanation:

3х + 6у = 9 => 5*3x+5*6у = 9*5 => 15x+30у=45 (1)

5х + 7y = -49 => 3*5x + 3*7y = -49*3 => 15x+21y=-147 (2)

(1)-(2) => 9y = 192 => y = 64/3

x = -119/3