Question

13x + 19y = 90 and 19x + 13y = 70 then x+y=?

Answer 1

Answer:

5

Step-by-step explanation:

13x + 19y =90     ....(1)

19x + 13y =70     ....(2)

adding (1),(2)

32x + 32y =160

dividing by 32 on both sides

x +y = 160/32

x +y = 5

as required

hope it helped

plz mark brainliest

Answer 2

Given: two equations 13x + 19y =90   ,   19x + 13y =70  

To find: x+y=?

Solution:

• So we have given the two equations, where we can see that both the equations are in linear equations in two variables, that is x and y.

• So by solving both the equations simultaneously, we can find the solution of x+y

• So now adding both the equations, we get:

32x + 32y =160

• Now,

• by dividing by 32 on both sides, we get:

x +y = 160/32

x +y = 5

Answer:

        So the value of x+y obtained is 5.