Question

x-y=7 / x+y=25
;P. Jsjebei as enskishjwksudhsjjs

Answer 1

x+x= 2x
y -y= 0
25+7= 32

2x+0= 32
2x= 32
$x = \frac{32}{2}$
x= 16
_________
$x + y = 25 \\ 16 + y = 25 \\ y = - 16 + 25 \\ y = 9$
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$x - y = 7 \\ 16 - 9 = 7$
_____
$x + y = 25 \\ 16 + 9 = 25$