The difference of six times a number and 7 is -49

If you would like to find the number, you can calculate this using the following steps:

n = ? ... a number

the difference of six times a number and 7 is -49
6 * n - 7 = - 49
6 * n = - 49 + 7
6 * n = - 42
n = - 42 / 6
n = - 7

The correct result would be - 7.

Agc and bgd are vertical angles

A) for the n row: 22+(n-1)×6therefore,b) 100-22=78that means (n-1)×6=7878÷6=1313+1=1414th row has 100 seats