Question

Solve the following pair of linear equations by substitution method. 1)x+y=14

2)x-y=4

Answer 1

we have,
x+y=14
x-y=4
then,
x-y=4
x=y+4
now, putting the value of x in equation x+y=14.

y+4+y=14
2y=14-4
y=10\2
y=5
therefore, x=5+4=9.

Answer 2

Hi there !!

x + y = 14 ------> [ 1 ]

x - y = 4
WE can also write it as :-
x = 4 + y

Substitute this value of x in equation [ 1 ]
4 + y + y = 14
4 + 2y = 14
2y = 14 - 4
2y = 10
y = 10/2
y = 5

to find the value of x :-
x = 4 + y
x = 4 + 5
x = 9