Question

Solve for the variable :
1) x + -11 = 14
2) x + 80 = -19
3) a + 5.1 = 10.9
4) -x + -58 = -20

Answer 1

1) add 11 to both sides
2) subtract 80 from both sides
3) subtract 5.1 from both sides
4)
a) first add 58 to both sides
b) then change the sign of both sides