Question

afla nr necunoscut din espresia 200-{100-2×[58+(30-18 :z)]:4}=141 va rog cat mai repede

Answer 1

200 - {100-2×[58+(30-18 :z)]:4} = 141

100-2×[58+(30-18 :z)]:4 = 200-141

100-2×[58+(30-18 :z)]:4 = 59

2×[58+(30-18 :z)]:4 = 100 - 59

2×[58+(30-18 :z)]:4 = 41

2×[58+(30-18 :z)] = 41 × 4

2×[58+(30-18 :z)] = 164

58+(30-18 :z) = 164 : 2

58+(30-18 :z) = 82

30-18 : z = 82 - 58

30-18 : z = 24

18 : z = 30 - 24

18 : z = 6

z = 18 : 6

z = 3