Question

if 2x+3y=10 and x+y=1 then

a)x=6 y=7. b) x=-7, y=8
c)x=7 ,y= 8
what will be the answer please help me ​

Answer 1

Answer:

b) x=-7, y=8

Step-by-step explanation:

$2x+3y=10...i \times 1 \\ x+y=1...ii \times 2$

$2x+3y=10...iii \\ 2x+2y=2...iv$

on subtract eq iii. and iv

2x+3y=10

(-)2x+2y= 2

y= 8

substituting value of y in eq ii

$x+y=1 \\ x + 8 = 1 \\ x = 1 - 8 \\ x = - 7$

option b) x=-7, y=8