Question

Solve by equating coefficient method
3х + 2y =13 ; x - y =1​​

Answer 1

Answer:

x = 3 and y = 2

Explanation:

3x + 2y = 13. - equation 1

x - y = 1. - equation 2

In equation 2 - x = 1 + y. - equation 3

Putting equation 3 in equation 1 -

3(1 + y) +2y = 13

3 + 3y + 2y = 13

5y + 3 = 13

5y = 13 - 3

5y = 10

y = 10/5 = 2

x = 1+2 = 3

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Answer 2

Answer:

x=1+y

3(1+y)+2y=13

3+3y+2y=13

3+5y=13

5y=13-3

5y=10

y=10/5

y=2

x=1+2

x=3,y=2