Question

( x + 1 ) + ( x + 4 ) + ( x + 7 ) + ( x+10 ) + ( x +13 ) = 155

Answer 1

Ta có: ( x + 1 ) + ( x + 4 ) + ( x + 7 ) + ( x+10 ) + ( x +13 ) = 155

=> 5x + ( 1 + 4 + 7 + 10 + 13) = 155

=> 5x + 35 = 155

=> 5x = 120

=> x = 24

Answer 2

( x + 1 ) + ( x + 4 ) + ( x + 7 ) + ( x + 10 ) + ( x + 13 ) = 155

 x + ( 1 + 4 + 7 + 10 + 13 ) = 155

x  +   35                            = 155

x                                       = 155 - 35

x                                       =    120  

Answer 3

Giải:

Ta có: (x+1)+(x+4)+(x+7)+(x+10)+(x+13)=155

=> 5x+(1+4+7+10+13)=155               (5x có nghĩa là 5.x vì có 5 chữ x)

=>5x+35=155

=>5x=155-35

=>5x=120

=>x=120:5

=>x=24

Answer 4

Ta có: ( x + 1 ) + ( x + 4 ) + ( x + 7 ) + ( x+10 ) + ( x +13 ) = 155

=> 5x + ( 1 + 4 + 7 + 10 + 13) = 155

=> 5x + 35 = 155

=> 5x = 120

=> x = 24

Answer 5

Ta có: ( x + 1 ) + ( x + 4 ) + ( x + 7 ) + ( x+10 ) + ( x +13 ) = 155

=> 5x + ( 1 + 4 + 7 + 10 + 13) = 155

=> 5x + 35 = 155

=> 5x = 120

=> x = 24