Question

X + y = 4 3x + 4y= 14

Answer 1

Y = 4 - x
3x + 4(4-x) = 14
3x + 16 -4x = 14
-x = -2
x = 2
y = 2

Answer 2

Answer:

$x = 2$

$y = 2$

Step-by-step explanation:

$x + y = 4 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: ...1\\ 3x + 4y= 14 \: \: \: \: \: \: \: \: \: \: \: ...2$

from equation 1 we get

$x = 4 - y$

put x = 4 - y in equation 2

$3(4 - y) + 4y= 14 \\ 12 - 3y + 4y = 14 \\ y = 14 - 12 \\ y = 2$

again, put y = 2 in equation 1

$x + 2 = 4 \\ x = 4 - 2 \\ x = 2$

thus, x = 2 and y = 2