Question

aflati valoarea lui x din egalitatea 81-{16-100:[36-42:x:(15:3-4:1)-20}+14*5}=5

Answer 1

81-{16-100:[36-42:x:(15:3-4:1)-20]+14*5}=5
16-100:[36-42:x:(5-4)-20]+70=81-5
16-100:(36-42:x:1-20)+70=76
16-100:(36-42:x:1-20)=76-70
16-100:(36-42:x:1-20)=6
100:(36-42:x:1-20)=16-6
100:(36-42:x:1-20)=10
36-42:x:1-20=100:10
36-42:x:1-20=10
36-42:x:1=10+20
36-42:x:1=30
42:x:1=36-30
42:x:1=6
42:x=6×1
42:x=6
x=42:6
x=7