Question

Solve by linear elimination. 3x+y=-17. 5x-2y=13

Answer 1

`3x + y = - 17 - - - eqn(i) \\ 5x - 2y = 13 - - - eqn(ii) \\ by \: elimination \\ (2 * eqn(i)) + eqn(ii) \\ (6 + 5)x + (2 - 2)y = ( - 34+ 13) \\ 11x = - 21\\ x = - (21)/(11) \\ substitute \: for \: x \: in \: eqn(i) \\ - ( 63)/(11) + y = - 7 \\ y = - 7 + (63)/(11) \\ y = - ( 14)/(11)`