Tìm x biết \(\dfrac{x-2}{2020}+\dfrac{x-3}{2019}=\dfrac{x-2019}{3}+\dfrac{x-2020}{2}\)

tìm x biết

\(\frac{\left(2019-x^2\right)+\left(2019-x\right)\left(x-2020\right)+\left(x-2020\right)^2}{\left(2019-x\right)^2-\left(2019-x\right)\left(x-2020\right)+\left(x-2020^2\right)}\)  = \(\frac{19}{49}\)

Tìm x biết \(\frac{\left(2019-x\right)^2+\left(2019-x\right)\left(x-2020\right)}{\left(2019-x\right)^2-\left(2019-x\right)\left(x-2020\right)}\)\(\frac{+\left(x-2020\right)^2}{+\left(x-2020\right)^2}\)\(=\frac{19}{49}\)

tìm x thuộc z, biết: x+(x+1)+(x+2)+(x+3)+.....+2019+2020=2020

Tìm x, biết:

\(\frac{\left(2019-x\right)^2+\left(2019-x\right)\left(x-2020\right)+\left(x-2020\right)^2}{\left(2019-x\right)^2-\left(2019-x\right)\left(x-2020\right)+\left(x-2020\right)^2}=\frac{19}{49}\)

Các bạn mong giúp mình sớm nhé

Tìm x biết: 
( 1/2 + 1/3 + ... + 1/2021 ).x = 2021/1 +2019/2 + ... + 2/2019 + 1/2020

Tìm x biết: 
( 1/2 + 1/3 + ... + 1/2021 ).x = 2021/1 +2019/2 + ... + 2/2019 + 1/2020

Tìm x,biết:|x-2019|+|x-2020|=2

tìm x,y nguyên biết (x-2019)²⁰⁰⁰+(x+2020)^{^2020}=2020^{^y-2021}