Simple,
writing out the problem...

Simplify it...
-4x(6+5-1)
-4x(11-1)
-4x(10)
-40x
Making it look like...

Cancel out the common factors...
Thus making the answer:

.
Twenty percent of $35 is 0.20($35) = $7. The discount is $7.
53x2=106
250-106= 144
144/2=72
The length is 72cm
Subtract 22 on both sides