Question

Cum aflu valoarea literei: 521=5×2×1-0:1:3:5+n

Answer 1

521=10•1-0:3:5+n
521=10-0:5+n
521=10-0+n
521=10+n
n=521-10
n=511

Answer 2

521=5×2×1-0:1:3:5+n
521= 10 - 0 + n
10  + n = 521
n =521 - 10
n = 511