Question

solve by substitution method 2x+3y=1
2x-4y= - 24

Answer 1

Answer:

Step-by-step explanation:

2x-4y=-24

x-2y=-12----------(1)

2x+3y=1

2x=1-3y

x=1-3y/2 -----------(2)

substitute this in equ 1

(1-3y/2)-2y=-12

1-3y-4y=-24

1-7y=-24

-7y=-25

y=25/7

x=1-3(25/7)/2

x=7-75/2*7

x=-68/2=-34/7

Answer 2

Answer:

2X-3Y = 1

2X-4Y = -24

2X+3Y=1

==> 2X= 1-3Y

==> X = 1-3Y/2....(1)

PUTTING VALUE OF X OF EQ(1) IN 2X-4Y=-24

==> 2X-4Y=-24

==> X-2Y = -12

==> 1-3Y/2 -2Y = -12

==> 1-3Y-4Y/2  = -12

==> 1-7Y = -24

==> -7Y = -25

==> y = 25/7

putting value of y in 2x+3y=1

==> 2x+3(25/7) = 1

==> 2x + 75/7 = 1

==> 2x = 1-75/7

==> 2x = -68/7

==> x =  -34/7