Question

DOU
.
. Solve the simlaneous equation

$x + y = 4 \: 2x5y = 1$
​

Answer 1

Answer:

x+y=4 ___(1), 2x−5y=1__(2)

multiply eq. (1) by 2.

and then subtract eq. (2)

2x+2y=8

2x−5y=1

- + -

____________

7y=7

y=1

x+y=4

x+1=4

x=3