Question

if 2x+y=5;3x+4y=5 find the value of x+y​

Answer 1

Step-by-step explanation:

2x+y= 5_____(1)

3x+4y = 5______(2)

Multiply eq (1) by 4 and subtract eq (2) from the resultant

5x = 15

x= 3

Substitute x= 3 in eq(1)

6+y = 5

y= -1

Therefore ,x+y = 2

Answer 2

Answer:

x+y=2

Step-by-step explanation:

 3x+4y=5

-8x-4y=-20

by calculation

=> -5x=-15

=> x=3

by substitution

y=-1

therefore x+y = 3-1 = 2