Question

Determina numărul natural x din egalitatea: [(x×2+3)×4:5+6]+7-8=9
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Answer 1

x=?
[(x×2+3)×4:5+6]+7-8=9
[(x×2+3)×4:5+6]+7=9+8=17
(x×2+3)×4:5+6=17-7=10
(x×2+3)×4:5=10-6=4
(x×2+3)×4=4×5=20
x×2+3=20:4=5
x×2=5-3=2
x=2:2=1 ⇒ x=1