Question

How do you solve x+4y=19 and y=−2x−4?

Answer 1

Solution by RKRAUSHAN :--

=> x + 4y = 19 -----(1)

=> 2x + y = -4 ----(2)

=> x = 19 -4y ___from eq ___(i)


putting value of x into equation (2) we get


=> 2(19 -4y) +y = -4

=> 38 -8y +y = -4

=> 7y = 42

=> y=6

=> X= -5

$\huge\underline\red{Hope \: it \: helps \: } \\ \: \huge\underline\green{Thank \: U}$

Answer 2

Heya mate your answer is here:

X + 4y = 19.....(1)

y = -2x - 4

2x + y = -4....(2)

on multiplying with 2 in equation (1),

2x + 8y = 38....(3)

equation (2)- equation (3)

2x + y - (2x + 8y) = -4 -38

-7y = -42

y = 6

then X = 19 -4 × 6= 19 - 24 = -5

X= -5, y= 6