Question

4. Află numărul necunoscut
7 x 9-a = 50
mx 6 + 17 = 65
100 - (3 x n + 5x n) = 44​

Answer 1

• 7 x 9 - a = 50

=> 54 - a = 50

=> a = 54 - 50

=> a = 4

• m x 6 + 17 = 65

=> 6m = 65 - 17

=> 6m = 48

=> m = 48 : 6

=> m = 8

• 100 - (3 x n + 5 x n) = 44

=> 100 - 8n = 44

=> 8n = 100 - 44

=> 8n = 56

=> n = 56 : 8

=> n = 7

----------ᵈⁱᵃ----------