Graphing is a good method when you have small integers or fractions as your slope.
Substitution is a good method when you have two equations, and when one of the coefficient of the variables is one.
Linear combinations is a good method when you have the same coefficient for the same variable in 2 different equations.
Answer:
it matters how many colors are there
-6z+ 12
= -6(z -2) (distributive property)
The final answer is -6(z -2)~
