Question

27x + 23y = 215 and 23x + 27y = 135. Find x + y.​

Answer 1

Step-by-step explanation:

We have,

27x + 23y = 215 (1)

31x + 27y = 135 (2)

To find, the values of x and y=?

By elimination method,

31(27x + 23y = 215)=837x+713y=6665

27(31x + 27y = 135)=837x+729y=3645

- - -

↔↔↔↔↔↔

/ -16y=3020

y=3020/-16

y=-188.75

put y in 1st

27x+23(188.75)=215

27x+4341.25=215

x+4341.25=215/27

x=7.96-4341.25

x=4333.29