Question

solve the following pair of linear equatio 2x+y=7 3x-y=8​

Answer 1

Answer:

2x +y=7

3x-y=8

by simple elimination method

y will be eliminated

and 2x+3x will be added also 7 and 8 will also be added

so, 5x=15

x=15/5=3

substituting value of x in eq.1

2*3+y=7

6 +y =7

y=7-6=1

Answer 2

Question

2x+y=7 3x-y=8. find x and y

solution

solving by substitution methord

as we can see both equation have a equal term which is y

(*we add both equation when there is - sign is on one equation on the term which we are taking and + sign on other term)

so by adding both of them

2x + y = 7

3x - y = 8

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

5x = 15

then x = 3

so to find y

we put value of x in either of equation I put them in 1st one

so 2(3) + y = 7

6 + y = 7

y = 7 - 6

y = 1

so value of x = 3 and y= 1

hope it helps

be brainly