Question

( x+1)+( x+4)+( x+7)+.........+( x+28)  =156

Answer 1

( x + 1 ) + ( x + 4 ) + ( x + 7 ) + ... + ( x + 28 ) = 156

( x +  x + x + ... + x ) + ( 1 + 4 + 7 + ... + 28 ) = 156

x X 10 + 145 = 156

x X 10 = 156 - 145 

x X 10 = 11

x = 11 : 10

x = 1,1

Answer 2

(x+1)+(x+4)+(x+7)+......+(x+28)=156

10x+   (1  + 4  +  7 +...+28)      =156

10x+145=156

10x        =156-145

10x        =11

    x        =11:10

     x        =1,1

Answer 3

\(\left(x+1\right)+\left(x+4\right)+....+\left(x+28\right)=156\)

\(\Rightarrow\left(x+x+...+x\right)+\left(1+4+...+28\right)=156\)

\(\Rightarrow10x+145=156\)

\(\Rightarrow10x=11\)

\(\Rightarrow x=\frac{11}{10}\)