Question

(a-2)x6+2x(7-5)x6-30.

Answer 1

Răspuns:

Explicație pas cu pas:

Afla necunoscuta:

(a - 2) × 6 + 2 × (7 - 5) × 6 - 30 = 0

( a - 2 ) × 6 + 2 × 2 × 6 - 30 = 0

( a - 2 ) × 6 + 24 - 30 = 0

( a - 2 ) × 6 = 0 + 30 - 24 → aplic metoda mersului invers

( a - 2 ) × 6 = 6

a - 2 = 6 : 6

a - 2 = 1

a = 1 + 2

a = 3

Verific:

(3 - 2) × 6 + 24 - 30 = 6 + 24 - 30 = 30 - 30 = 0