Question

If the sum is 30 and the difference is 20, what is the anwser

Answer 1

Step-by-step explanation:

$x + y = 30$

$x - y = 20$

$x = y + 20$

$y + 20 + y = 30$

$2y + 20 = 30$

$2y = 10$

$y = 5$

$x = 20 + y = 20 + 5 = 25$

$(x = 25) \\ (y = 5)$