Question

16. Se dă egalitatea:
(9-64:8 +6 xb): 5 = 25: 5.
Valoarea lui b este:
a. 4;
b. 6;
c. 1
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Answer 1

(9-64:8+6×b):5=25:5

(9-8+6×b):5=5

(1+6×b):5=5

1+6×b=5×5

1+6×b=25

6×b=25-1

6×b=24

b=24:6

b=4

Raspuns : a). 4

Answer 2

( 9 - 64 : 8 + 6 × b ) : 5 = 25 : 5

( 9 - 8 + 6 × b ) : 5 = 5

( 1 + 6 × b ) : 5 = 5

1 + 6 × b = 5 × 5

1 + 6 × b = 25

6 × b = 25 - 1

6 × b = 24

b = 24 : 6

b = 4