Q1
Answer:

Step-by-step explanation:

explanation for second step:
you divide each side by 3 to get rid of the '3' in '3x'
THis equals the number of permutations of 4 from 6.
= 6P4 = 6! / (6 - 4)! = 6! / 2! = 720/2 = 360 answer
Answer:
Infinite solutions
Step-by-step explanation:
Equation M is equation P multiplied by 3. The equations are dependent, so any solution of one of them is also a solution of the other. There are an infinite number of (x, y) pairs that will satisfy either (both) equation(s).
Answer:
(13/2,7/2)
Step-by-step explanation:

is the same thing as

. We can rewrite this as

. Or course this is not simplified, so we can simplify to get

.