solve the following pair of linear equation by all three method of algebra:2x+y=4,2x-y=4
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2x+y=4
2x-y=4
by add 4x =8
x=8/4
x=2
put the value of x in equation 1
2(2)+y=4
4+y=4
y=4-4
y=0
2x-y=4
by add 4x =8
x=8/4
x=2
put the value of x in equation 1
2(2)+y=4
4+y=4
y=4-4
y=0
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