Question

( x + 1 ) + ( x + 2 ) + ( x + 3 ) + .... + ( x + 100 ) = 5550

Answer 1

( x + 1 ) + ( x + 2 ) + ( x + 3 ) + .... + ( x + 100 ) = 5550

= 100x + 5050

= 5550

100x = 500

x       = 5

Answer 2

(x+1)+(x+2)+(x+3)+...+(x+100)=5550

100.x+(1+2+3+...+100)=5550

100.x+5050=5550

100.x=5550-5050

100.x=500

x=500:100=5

Answer 3

( x + 1 ) + ( x + 2 ) + ( x + 3 ) + .... + ( x + 100 ) = 5550

Có:100 số= 50 cặp

Tổng :1+2+3+...+100=5050

100x+5050

=5550

X=(5550-5050):100

x=5

Chúc bn học tốt

Answer 4

100x +(1+2+...+1000)=5550

x=  (5550-(1+2+...1000)/100

x=  (5500-50500)/100

x=500/100

x=5

Vậy x=5

Answer 5

\(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+...+\left(x+100\right)=5550\)

\(=100×x+\left(1+2+3+...+100\right)=5550\)

\(=100×x+5050=5550\)

\(=100×x=500\)

\(x=5\)

Answer 6

\(\left(x+1\right)+\left(x+2\right)+...+\left(x+100\right)=5550\)

\(\Rightarrow x+1+x+2+x+3+...+x+100=5550\)

\(\Rightarrow\left(x+x+x+...+x\right)+\left(1+2+3+...+100\right)=5550\)

\(\Rightarrow100x+\frac{\left(1+100\right).100}{2}=5550\)

\(\Rightarrow100x+5050=5550\)

\(\Rightarrow100x=500\Rightarrow x=5\)

Vậy\(x=5\)

Answer 7

\(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+...+\left(x+100\right)=5550\)

\(=100x+5050\)

\(=5550\)

\(\Rightarrow100x=500\)

\(x=500:100\)

\(x=5\)