First, let's simplify the left side of the equation:
(20-a)-6 7/18= 20 - a - 6 - 7/18= 14 - a - 7/18
Now, let's simplify the right side of the equation:
3 17/18= 3 + 17/18= 54/18 + 17/18= 71/18
So, the equation becomes:
14 - a - 7/18 = 71/18
Now, let's solve for a:
Therefore, the solution to the equation is a = -29/3.
First, let's simplify the left side of the equation:
(20-a)-6 7/18
= 20 - a - 6 - 7/18
= 14 - a - 7/18
Now, let's simplify the right side of the equation:
3 17/18
= 3 + 17/18
= 54/18 + 17/18
= 71/18
So, the equation becomes:
14 - a - 7/18 = 71/18
Now, let's solve for a:
14 - a - 7/18 = 71/18
a - 7/18 = 71/18 - 14a - 7/18 = 71/18 - 252/18a - 7/18 = -181/18a = -181/18 + 7/18a = -181/18 + 7/18
a = -174/18
a = -29/3
Therefore, the solution to the equation is a = -29/3.