1.

If 2x+3y=7;2y-x=0 then find value of x

Answer»
2x + 3y = 7 .......(<klux>1</klux>)\\ 2y - x = 0.......(<klux>2</klux>)
from (2)

x = 2y

PUTTING x=2y in (1)

2(2y) + 3y = 7 \\ 7y = 7 \\ y = 1
and SINCE x=2y

x = 2(1) = 2


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