#### Answer

2x + 7 = x + 6;
x = -1

#### Work Step by Step

"twice a number" translates to 2x.
"the sum of twice a number and 7" translates to 2x + 7.
"the sum of the number and 6" translates to x + 6.
Therefore, the equation is:
2x + 7 = x + 6
Solve for x:
x + 7 = 6
x = -1