Question

Q1.find the solution of the pair of linear equations by graphical method x+y=5 & 2x+y=7​.

Answer 1

Explanation:

➙x+y= 5------(1)

➙2x+y= 7-----(2)

Taking first Equation

x+y=5

➙x=5-y

At y= 0

➙x= 5

At y=1

➙x= 4

Plot the points (5,0) & (4,1) into graph

-----------------------------------------------------------

2x+y= 7

➙y= 7-2x

At x= 0

➙y= 7

At x=1

➙y= 5

Plot the points (0,7) & (1,5) into graph

After plotting the points we obtained graph is in a straight line which intersect at (2,3)

Hence,the solution of the given equation is (2,3)

Which means x= 2 & y= 3.

Answer 2

Answer:

x+y=5

y=5-x____ equation ( 1)

2x+y=7

y=7-2x ___ equation (2)

solve this equations by substituting values

put that value u get solutions and draw the points on graph has intersecting lines

Explanation:

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