Question

if 3x+5y=8 and 7x-3y=48 then find the value ofx+y​ please answer fast

Answer 1

Answer:

Here s the ans

Step-by-step explanation:

ANS

Answer 2

given equation is

$3x+5y=8$ ____(1)

$7x-3y=48$ ____(2)

find value of $x+y$

multiply equation 1 by 7 we get

$21x+35y=56$ ____ (3)

multiply equation 2 by 3 we get

$21x-9y=144$ ____(4)

subtract between equation(3) and (4)

$44y=88$

$y=\frac{-88}{44}$

$y=-2$

put the value of y in equation (1) we get

$3x+5(-2)=8$

$3x-10=8$

$3x=10+8$

$3x=18$

$x=\frac{18}{3}$

$x=6$

value of $x+y$

=$6+(-2)$

=$4$

so the value of x+y is 4.