Question

solve x+y=14andx-y=2

Answer 1

x + y = 14
x = 14 - y
now,

x - y = 2
14 - y - y = 2
- 2y = - 12
2 y = 14
y = 7
so, x,= 14-7 = 7.

Answer 2

X+y=14........1
x-y=2...........2
from 1 n 2
2x=16
X=8
sub X in 1
X+y=14
8+y=14
y=6
I hope it will help you