(If you don't know, don't answer) How can I solve them?
1. 44=t−72
2. 18+z=40
3.18−(−f)=91
4. −57=y−2
5. 14=d+(−10)

1) 44=t-72

Add 72 to both sides and you'll get [116=t]

2) 18+z=40

Subtract 18 from both sides to get [z=22]

3) 18-(-f)=91

18-(-f)= means 18+f=91

Subtract 18 from both sides to get f=73

4) -57=y-2

Add 2 to both sides to get -55=y

5) 14=d+(-10)

14=d+(-10) means 14=d-10

Add 10 to both sides to get 24=d