Question

Ma gandesc la un numar.il adun cu 14,3rezultatul il inmultesc cu 2,5.din noul reztat scad 21,83si obton 20,17. Care eate nr la care mam candit?

Answer 1

[(a+14,3)x2,5]-21,83=20,17
[(a+14,3)x2,5]=20,17+21,83
(a+14,3)x2,5=42
a+14,3=42:2,5
a+14,3=16,8
a=16,8-14,3
a=2,5

Answer 2

[(a+14,3) •2,5]-21,83=20,17
(a+14,3)•2,5=20,17+21,83=42
a+14,3=42: 2,5=420:25=16,8
a=16,8-14,3=2,5