Step-by-step explanation:

Collect like terms and simplify
[tex] -10n+30n=-36-24 \\ 20n = -60 [/tex]
Divide both sides of the equation by 20
[tex] 20n/20 = -60/20 \\ n=-3 [/tex]
the answer is 4 because 16 and 20 can both be divided by 4.
Answer:
2
Step-by-step explanation:
If we have the length and the breadth of a rectangle then we can draw a unique rectangle because we know already that all the vertex angles are equal to 90 degrees. Hence, only two measurements are required.
Answer: 21/5
Step-by-step explanation:
Substitution.
Elimination.
Using a Combination of methods.
Using absolute value
I hope this helps!