Question

eliminaton method 15x-14y=117 14x-15y=115​

Answer 1

Answer:

(5,-3)

Step-by-step explanation:

15x-14y=117........(I)

14x-15y=115........(II)

Add eqn (I) and (II).

15x-14y=117

14x-15y=115

+

__________

29x-29y=232

Divide eqn by 29

x-y=8........(III)

Subtract eqn (I) and (II).

15x-14y=117

14x-15y=115

(-) (+) (-)

__________

1x+1y=2

Divide eqn by 1

x+y=2..........(IV)

Add eqn (III) and (IV),

x-y=8

x+y=2

_______

2x =10

x=10/2

x=5

substituting x=5 in eqn (IV),

5+y=2

y=2-5

y= -3