Answer:
10cm, 5cm, 7cm.
Step-by-step explanation:
So basically what I did was I pretended the line was a ruler that was in centemeters, and all the lines were centimeters, so then I added it up to get my answer, as you can see in the picture
It is the commutative property since you can switch 5 and 4 around but still get the same answer (9).
Here's the solution,
=》

=》

now, let's multiply the whole equation with 4
=》

=》

=》

=》

so,
Case 1. where, 2x - 5 = 0
=》

case 2. where, 2x - 1 = 0
=》
