Question

Cum verificăm aflarea termenului necunoscut a =1;5•{6:[7•(1+2)-15)+1}-5=5

Answer 1

Răspuns:

Explicație pas cu pas:

5•{6:[7•(a+2)-15)+1}-5=5

5•{6:[7•(a+2)-15)+1} = 5 + 5 = 10

6:[7•(a+2)-15)+1 = 10 : 5 = 2

6:[7•(a+2)-15] = 2 - 1 = 1

7•(a+2)-15 = 6 : 1 = 6

7•(a+2) = 15 + 6 = 21

a + 2 = 21 : 7 = 3

a = 3 - 2 = 1

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Verificare

5•{6:[7•(1+2)-15)+1}-5=5

5•[6:(7•3-15)+1]-5=5

5•[6:(21-15)+1]-5=5

5•(6:6+1)-5=5

5•(1+1)-5=5

5•2-5=5

10 - 5 = 5

5 = 5 adevarat, deci a = 1 este solutia corecta