Question

Help i am not sure if it is right

Answer 1

Hi,

Explanation:

`\left\{\begin{array}c5x+y&=&-3&3&1\\x-3y&=&25&1&-5\\\end {array} \right.\\\\\\\\\left\{\begin{array}{ccc}16x&=&16\\16y&=&-128\\\end {array} \right.\\\\\\\left\{\begin{array}{ccc}x&=&1\\y&=&-8\\\end {array} \right.\\\\`

Verification:

5*1+(-8)=-3

1-3*(-8)=1+24=25