Question

12x+13y=29 and 13x+12y=21 find (x+y)

Answer 1

please urgent help needed

Answer 2

i guess no help for me :(

Answer 3

hi

Answer 4

hi

Answer 5

try to subtract the one equation from the another

Answer 6

-1x+1y=8

Answer 7

now?

Answer 8

-x+y=8

Answer 9

x=y-8

Answer 10

put this in one of the equation

Answer 11

12(y-8)+13y=29
12y-96+13y=29
25y=29+96
25y=125
y=125/25
y=5

Answer 12

x=y-8
x=5-8=-3
then x+y=-3+5=2