Question

BAI 1 TIM A , 720 CHIA ( A NHAN 2 CONG A NHAN 30 = 2 NHAN 6

Answer 1

720:(ax2+ax30)=2x6

(=)720:[ax(2+30)]=12

(=)720:(ax32)=12

(=)ax32=720:12

(=)ax32=60

(=)a=60:32

(=)a=15/8

           

Answer 2

720:(A.2+A.30)= 2.6

=> 720:(A.2+A.30)=12

=> A.2+A.30=720:12

=> A.2+A.30=60

=> A.(2+30)=60

=> A.32=60

=> A=60:32

=> A=\(\frac{15}{8}\)

Answer 3

                     Giải

Theo đề bài , ta có :\(720\div\left(a\times2+a\times30\right)=2\times6\)

\(\Leftrightarrow\frac{720}{a\times2+a\times30}=12\)

\(\Leftrightarrow\frac{720}{a\times2+a\times30}=\frac{12}{1}\)

\(\Leftrightarrow720\times1=12\left(a\times2+a\times30\right)\)

\(\Leftrightarrow720=12\left[a\left(2+30\right)\right]\)

\(\Leftrightarrow720=12\left[a\times32\right]\)

\(\Leftrightarrow a\times32=720\div12\)

\(\Leftrightarrow32a=60\)

\(\Leftrightarrow a=\frac{60}{32}\)

\(\Leftrightarrow a=\frac{15}{8}\)

Answer 4

CAM ON CAC BN NHUNG MINH VAN CHUA CHAC CHAN LAM

Answer 5

MINH VIET NHAM DE ROI  = 2 NHAN 3

Answer 6

XIN LOI CAC BN

Answer 7

Nếu là 2x3 thì bằng \(\frac{15}{4}\)nha