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Aflati numarul natural x din egalitatea: 4•[20+60:(125-7•15)]+x=100

Răspuns :

4*[20+60:(125-7*15)]+x=100
4*[20+60:(125-105)]+x=100
4*[20+60:20]+x=100
4*[20+3]+x=100
4*23+x=100
92+x=100
x=100-92
x=8
4x[20+60:(125-7x15)]+x=100
4x[20+60:(125-105)]+x=100
4x[20+60:20]+x=100
4x[20+3]+x=100
4x23+x=100
92+x=100
x=100-92
x=8

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