Question

tìm x

970-x+x+x+....+x=1874 [ có 10 số x ] 

Answer 1

Ta có :

970 - x + x + x + x + x + x + x + x + x + x = 1840 

\(\Rightarrow970-x+\left(x+x+x+x+x+x+x+x+x\right)=\) \(1840\)

\(\Rightarrow970-x+9x=1840\)

\(\Rightarrow970+8x=1840\)

\(\Rightarrow8x=1840-970\)

\(\Rightarrow8x=870\)

\(\Rightarrow x=108,75\)

Answer 2

Ta có :

970 - x + x + x + x + x + x + x + x + x + x = 1840 

⇒970−x+(x+x+x+x+x+x+x+x+x)= 1840

⇒970−x+9x=1840

⇒970+8x=1840

⇒8x=1840−970

⇒8x=870

⇒x=108,75