Question

Solve:
2x + y = 11
x+y = 8
​

Answer 1

in 2nd equation multiplied by 2

by substract

2 x + y = 11

2 x + 2y = 16

___________

y = 5

put the value of y in equ 2

2x + 10 = 8

x = -1

Answer 2

Answer:

x=3,y=5

Step-by-step explanation:

2x+y=11 eq1

x+y=8 eq 2

changing sings

2x+y=11

-x-y=-8

+y,-y gets canclled

x=3

substitute x=3 in eq 2

3+y=8

y=5

check

subsitute x=3 , y=5

2(3)+5=11eq 1

3+5=8eq 2

proved