Question

solve equation graphically: 3x+y-11=0; x-y+1 =0​

Answer 1

1. Question⇒  solve equation graphically: 3x+y-11=0; x-y+1 =0​

Step-by-step explanation:

• line 1: 3x+y-11=0   or 3x+y=11
• line 2: x -y-1=0      or x-y=1
• line1 + line2...(3x+x) +(y-y)=12
• 4x=12
• x=3
• from line 2...y=x-1=2
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Answer 2

Answer:

x = 2.5 and y = 3.5

Step-by-step explanation:

Given :

3 x + y - 11 = 0

y = 11 - 3 x ....( i )

x - y + 1 = 0

y = x + 1

From  ( i ) and ( ii ) we get

11 - 3 x = x + 1

3 x + x = 11 - 1

4 x = 10

x = 2.5

putting x = 2.5 in ( ii ) we get

y = x + 1

y = 2.5 + 1

y = 3.5

Thus we get x = 2.5 and y = 3.5

Now we can see on coordinate plan there is intersection point at ( 2.5 , 3.5 ).