1. L1= 7 L2=7 W1= 3 W2=3 2. L1= 5 L2=5 W2=5 W2=5 3. L1= 6 L2=6 W1=4 W2=4
Simple,
so you have...
-5m=-35
You are trying to find m, so, to
isolate the variable divide both sides by -5:

m=7
Now, to check your work, plug in m.
-5(7)=-35
-35=-35
Thus, you know your answer is correct.
Answer: x = 3π/2
Hope this helps...... Stay safe and have a great rest of the weekend!!! :D
Since z is proportion to the x
z = a x
190 = a 10
a = 19
when x = 13
z = a x
z = 19 * 13
z = 247