x+19=12
x=12-19
x=-7
-25 - x = -17
-x = -17 + 25
-x = 8
x = -8
1) x+19=12
2) -25-x=(-17)
-x=(-17)+25
-x=8
x=(-8)
x+19=12
x=12-19
x=-7
-25 - x = -17
-x = -17 + 25
-x = 8
x = -8
1) x+19=12
x=12-19
x=-7
2) -25-x=(-17)
-x=(-17)+25
-x=8
x=(-8)