Question

Calculați:


15-(7x5-9x9:b:3):8=11

Answer 1

15-(7×5-9×9:b:3):8=11

15-(7×5-9×9:b:3)=11×8

15-(7×5-9×9:b:3)=88

7×5-9×9:b:3=15-88

7×5-9×9:b:3= -73

35-81:b:3= -73

35-81:b= -73×3

35-81:b= -219

81:b=31-(-219)

81:b=31+219

81:b=250

b=81:250

b=0,234