Question

solve 3x+2y=11 , x+3y=13 in substitution method

Answer 1

Answer:

3x+2y=11, x+3y=13.

3x+2y=11......(1).

x+3y=13.

x=13-3y......(2).

Substitute x=13-3y in equation (1).

3x+2y=11.

3(13-3y)+2y=11.

39-9y+2y=11.

-9y+2y=11-39.

-7y=-28. (Because -×+=-, +×-=- & largest number is important)

y=-28/-7.

y=4. (Because -×-=+).

Substitute y=4 in equation (2).

x=13-3y.

x=13-3(4).

x=13-12.

x=1.

x=1 & y=4.

I think this is your answer.