Question

-2x + 4y = 5 and 4x + y = 5

Answer 1

-2x + 4y = 5 -(i)

4x + y = 5 -(ii)

eqn (i) x 2 --> -4x + 8y = 10

eqn (ii)       -->+ 4x  + 5y = 5

                 ---------------------------

                         0 + 13y = 15

                                  y = 15/13

                 ----------------------------

from eqn (i),

4x = 5 - y

4x = 5 - 15/13

4x = (65 - 15)/13

4x = 50/13

x = 50/52       

x = 25/26

(pls mark me brainliest ;D)    

Answer 2

Answer:

$4x + y = 5$

$4x = 5-y$

$x=\frac{5-y}{4}$

$-2x+4y=5$

$Replacing \: \: x \: \:with \: \frac{5-y}{4}$

$-2(\frac{5-y}{4})+4y=5$

$(\frac{5-y}{-2})+4y=5$

$(\frac{5-y-8y}{-2})=5$

$5-9y=-10$

$-9y=-15$

$y=15/9=5/3$

$4x+y=5$

$4x+\frac{5}{3}=5$

$\frac{12x+5}{3}=5$

$12x+5=15$

$12x=10$

$x=10/12=5/6$