Question

Solve 2x+5y=-13 3x - 4y = -8

Answer 1

Explanation:

2x+5y = -13 ---(1)

3x-4y = -8 ---(2)

from (2) :

3x = 4y-8

`x = (4y - 8)/(3) - - - (3)`

sub (3) into (1) :

`2( (4y - 8)/(3) ) + 5y = - 13`

`2(4y - 8) + 15y = - 39`

8y-16+15y = -39

23y = -23

y = -1 ---(4)

sub (4) into (3) :

`x = (4( - 1) - 8)/(3)`

`x = ( - 4 - 8)/(3)`

`x = ( - 12)/(3)`

x = -4

x = -4 and y = -1