Question

din ce nr. trebuie sa- l scad pe 20 pt. a obtine un nr.mai mic decat 5?

Answer 1

x-20=4
x=20+4
x=24
24-20=4...=>4<5

x-20=3
x=20+3
x=23
23-20=3...=> 3<5

x-20=2
x=20+2
x=22
22-20=2 ...=>2<5

x-20=1
x=20+1
x=21
21-20=1....=> 1<5