Question

Giăm ba cái điểm số làm cái tết mất ngon :)

Tìm x :x + x + x + x + x + x + x + x + 999 = 456 + 572

Answer 1

\(x+x+x+x+x+x+x+x+999=456+572\)

\(\Rightarrow1x+1x+1x+1x+1x+1x+1x+1x+999=1028\)

\(\Rightarrow\left(1+1+1+1+1+1+1+1\right)x=1028-999\)

\(\Rightarrow8x=27\Rightarrow x=27\div8=\frac{27}{8}\)

Answer 2

x + x + x + x + x +x + x + x + 999 = 456 + 572

<=>(1 + 1 + 1 + 1 + 1+ 1 + 1 + 1).x + 999 = 1028

<=>8x + 999 = 1028

<=>8x = 1028 - 999

<=>8x = 29

<=>x=3.625

Thử lại

3,625 + 3,625 + 3,625 + 3,625 + 3,625 + 3,625 + 3,625 + 3,625 + 999 = 456 + 572

1028 = 1028

Answer 3

Trl:

\(x+x+x+x+x+x+x+x+999=456+572\)

\(\Rightarrow8x+999=1028\)

\(\Rightarrow8x=1028-999\)

\(\Rightarrow8x=29\)

\(\Rightarrow x=3,625\)

Hc tốt

Answer 4

x + x + x + x + x + x + x + x + 999 = 456 + 572

=> 8x+999= 1028

             8x= 1028-999

             8x=29

               x= 29: 8

               x= 3, 625