Question

Brainliest? I'll give it!

Answer 1

Answer:

$x = 7$

$y = - 6$

Step-by-step explanation:

Add 4y to both sides in the first equation:

$x = 31 + 4y$

Substitute that new equation into the second equation:

$- (31 + 4y) + 3y = - 25$

$- 31 - 4y + 3y = - 25$

$- 31 - y = - 25$

Add 31 to both sides:

$- y = 6$

Divide -1 on both sides:

$y = - 6$

Substitute y=-6 in the third equation (first equation but modified)

$x = 31 + 4y$

$x = 31 + 4 ( - 6)$

$x = 31 + ( - 24)$

$x = 31 - 24$

$x = 7$