13. Write an equation of a line passing through the point representing solution of the pair of linear equations x+y = 2 and 2x–y = 1. How many such lines can we find?
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Step-by-step explanation
X+Y=2 , 2X-Y=1
x+y=1 , 2(x)-y=1
put,
'x' = a
'y' = b
a+b=2 × 2 ⇒ 2a+2b=4 ⇔1
2a-b=1 ⇒ 2a-b=1 ⇔2
3b=3
b=3\3
b=1
put b in 1
a+b=2
a+1=2
a=2-1
a=1
put, put,
x=a y=b
x=1 y=1
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