After Xiao Wang went home from a business trip for 7 days, he tore up the 7-day calendar at one time. Given that the sum of the 7-day dates is 63, what's the date when Xiao Wang went home?

After Xiao Wang went home from a business trip for 7 days, he tore up the 7-day calendar at one time. Given that the sum of the 7-day dates is 63, what's the date when Xiao Wang went home?

He went on the X
x+(x+1)+(x+2)+（x+3+(x+4)+(x+5)+(x+6)=63
7x+21=63
7x=42
x=6
6+7=13

Xiaoxin's father is on a business trip for seven days. When he gets home, he tears off all the calendars of the seven days. The sum of the known dates is 49. What's the date of Xiaoxin's father's coming home?

If the middle date is x, then the first three dates are X-1, X-2, x-3, and the following three dates are x + 1, x + 2, x + 3, then: (x-1) + (X-2) + (x-3) + X + (x + 1) + (x + 2) + (x + 3) = 49 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp

Xiaoxin's father is on a business trip for seven days. When he gets home, he tears off all the calendars of the seven days. The sum of the known dates is 49. What's the date of Xiaoxin's father's coming home?

If the middle date is x, then the first three dates are X-1, X-2, x-3, and the following three dates are x + 1, x + 2, x + 3, then: (x-1) + (X-2) + (x-3) + X + (x + 1) + (x + 2) + (x + 3) = 49 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp;                    7x=49                                        &A: it's the 10th when Xiaoxin's father comes home