Question

X+2.x+3:x+...+100.x=15150

Answer 1

\(x+2\cdot x+3\cdot x+...+100\cdot x=15150\)

\(\Rightarrow x\cdot\left(1+2+3+4+...+100\right)=15150\)

\(\Rightarrow x\cdot\left(100+1\right)\cdot\left[\left(100-1\right):1+1\right]:2=15150\)

\(\Rightarrow x\cdot101\cdot100:2=15150\)

\(\Rightarrow x\cdot5050=15150\)

\(\Rightarrow x=15150:5050\)

\(\Rightarrow x=3\)

Vậy: x=3

Answer 2

Mình ra x = 2 nha

Answer 3

$x+2\cdot x+3\cdot x+...+100\cdot x=15150$

$\Rightarrow x\cdot \left(1+2+3+4+...+100\right)=15150$

$\Rightarrow x\cdot \left(100+1\right)\cdot \left[\left(100-1\right):1+1\right]:2=15150$

$\Rightarrow x\cdot 101\cdot 100:2=15150$

$\Rightarrow x\cdot 5050=15150$

$\Rightarrow x=15150:5050$

$\Rightarrow x=3$

Vậy: x=3

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