Question

X+y=180 ,x-y=18 solution by elimination method

Answer 1

Explanation:

x + y= 180 (1)

x - y = 18 (2)

(1) - (2) 2y= 162

y= 81

(1) = x + 81 = 180

x = 180-81=99

x= 99 y= 81

Answer 2

Answer:

$x + y = 180$

......1

$x - y = 18$

.......2

by adding 1 and 2

we get

2x = 198

x= 99

y = 180 -99

y = 81