Question

6. Solve graphically the following pair of linear equations
3x +y+1=0
2x -3y +8=0

Answer 1

Answer:

x = 5/7 , y = 22/7

Step-by-step explanation:

By using Substitution method :

3x +y+1=0 -(1) 2x -3y +8=0 -(2)

3x = -1 - y

x = -1 - y/3

Put value of x in (2) equation

2(-1 - y /3) - 3y + 8 = 0

-2 - 2y/3 - 3y + 8 = 0

-2 - 2y - 9y + 24 /3 = 0

22 - 7y = 0

-7y = -22

y = -22/-7

y = 22/7

put value of y in (1) equation

3x + (-22/7) = -1

3x = -1 + 22/7

3x = -7 + 22/7

3x = 15/7

x = 15/7 * 3

x = 5/7

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