Question

x+y=5,2x+2y =10
graphical method

Answer 1

x+y=5
y=5-x. (1)

2x+2y=10
2x+2(5-x)=10
2x+10-2x=10
10=10
lhs=rhs

Answer 2

x+y=5

let x= 1 let x=2 let x=0
1+y=5 2+y =5 0+y=5
y=5-1 y= 5-2 y=5
y=4 y=3

Now draw a table,
|———————————————————|
|X | 1 | 2 | 0 |
|Y | 4 | 3 | 5 |
|———————————————————|

now on cartesian plane you can plot these points easily.

Simalry you can do for the second one, 2x+2y=10.