Question

Afla nr necunoscut : a) 8 × 4 + a = 6 × 9 + 16 ÷ 2 b) a - 9 × 8 = 32 ÷ 4 + 225 c) (6×6 ÷ 4 ×b) - 25 ÷ 5 = 11 × 2​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

8 × 4 + a = 6 × 9 + 16 : 2

32 + a = 54 + 8

32 + a = 62

a = 62 - 32

a = 30

_____________________

b)

a - 9 × 8 = 32 : 4 + 225

a - 72 = 8 + 225

a - 72 = 233

a = 233 + 72

a = 305

______________________

c)

( 6 × 6 : 4 × b ) - 25 : 5 = 11 × 2

( 36 : 4 × b ) - 5 = 22

9 × b = 22 + 5

9 × b = 27

b = 27 : 9

b = 3