Question

Tìm m, biết:

A, m x 3 + m x 7 = 1530

B, m x 13 - 4 x m = 918

Answer 1

A, m x 3 + m x 7 = 1530
    m x (3+7)       = 1530
    m x 10            = 1530
⇒ m = 153
 B, m x 13 - 4 x m = 918
     m x (13-4)       = 918
     m x 9               = 918
⇒ m = 102
 

Answer 2

a) m x (3+7)=1530

m x 10=1530

m=1530/10

m=153

b)m x (13-4)=918

m x 9=918

m=918/9

m=102

Answer 3

a) m x 3 + m x 7 = 1530

m x (3 + 7) = 1530

m x 10 = 1530

m= 1530 : 10

m= 153

b) m x 13 - 4 x m =918

m x (13 - 4)= 918

m x 9 = 918

m= 918 : 9

m= 102

Answer 4

\(a.m\times3+m\times7=1530\\ =m\times\left(3+7\right)=1530\\ =m\times10=1530\\ m=1530:10\\ m=153\)

\(b.m\times13-4\times m=918\\ m\times\left(13-4\right)=918\\ m\times9=918\\ m=918:9\\ m=102\)