Question

Afla nr necunoscut:

A) (48:6:4x5+63:7:3x8) + a= 100-(9x9-71):2x8=

Answer 1

a) (8 : 4 * 5 + 9 : 3 * 8) + a = 100 - 10 : 2 * 8 
2 * 5 + 3 * 8 + a = 100 - 5 * 8
10 + 24 + a = 100 - 40
a = 60 - 34
a = 26

Answer 2

(8:4x5+9:3x8)+a=100-(81-71):2x8
(2x5+3x8)+a=100-10:2x8
(10+24)+a=100-5X8
34+a=100-40
34+a=60
a=60-34
a=26