Answer :
x + y = 170
x - y = 26
-------------add
2x = 196
x = 196/2
x = 98
x + y = 170
98 + y = 170
y = 170 - 98
y = 72
solution is (98,72)
x - y = 26
-------------add
2x = 196
x = 196/2
x = 98
x + y = 170
98 + y = 170
y = 170 - 98
y = 72
solution is (98,72)