Question

Tìm x

71+65*4 bằng ( x+140) :x+260

các anh chị giải giúp em luôn nha

Answer 1

\(71+65\times4=\left(x+140\right):x+260\)

\(71+260=\left(x+140\right):x+260\)

\(71+260-260=\left(x+140\right):x\)

\(71=\left(x+140\right):x\)

\(71x=x+140\)

\(71x-x=140\)

\(70x=140\)

\(x=2\)

Answer 2

\(71+260=\frac{x+140}{x}+260\)

\(\frac{x+140}{x}=71+260-260=71\)

\(x+140=71x\)

\(x-71x=-140\)

\(-70x=-140\)

\(x=\frac{-140}{-70}=2\)

Vậy \(x=2\)

Answer 3

mạnh làm sai