Question

plzz solve question no 1 all of Ex-3.3 class 10

Answer 1

hiiii friends..........
here is your answer.........
X+y=14.............1
x-y=4................2

X+y=14 so,
X=14-y.........3
keeping the value of X in 2
14-y-y=4
14-2y=4
y=14-4=10
10/2=5

now the value of y keeping in 3
so, X=14-5=9
X=9. y=5

same is all questions