Question

tìm b 

b x 5 + b x 2 =1456

Answer 1

b x 5 + b x 2 = 1456

b x ( 5 + 2 ) = 1456

b x 7 = 1456

b = 1456 : 7 

b =      208

Answer 2

bx5+bx2=1456

=> bx(5+2)=1456

=> bx7=1456

=> b   = 1456 :7

=> b   = 208

Answer 3

bx5+bx2=1456

=>bx(5+2)=1456

=>bx7=1456

=>b=1456:7

=>b=208

(có thể bỏ dấu suy ra)

Answer 4

b x 5 + b x 2 = 1456 

b x ( 5 + 2 ) = 1456

b x 7 = 1456

b = 1456 : 7

b = 208

Answer 5

b x 5 + b x 2 = 1456

b x ( 5 + 2 ) = 1456

b x 7 = 1456

b = 1456 : 7

b = 208