Question

Determine o númerodesconhecido.
b) 8×(4+7)=(8×[ ]) +(8×7)
C) 1024×[ ]=1024
D) 48×(5+7)=( [ ]×5)+(48×7)

Answer 1

B) 8 • (4+7) = ( 8• x ) + (8•7)
8• 11 = 8x + 56
8x = 88-56
x= 32/8
x= 4

C) 1024 • x = 1024
x = 1024/1024
x= 1

D)48•(5+7)= (x • 5) + (48•7)
48• 12= 5x + 336
576= 5x + 336
5x= 576- 336
x= 240/ 5
x= 48