When using substitution, you want to solve an equation for one variable that doesn’t make the equation worse to work with.
The general idea is that you want to find a variable that has a coefficient of 1 or -1.
In 2.5x - 7y = 7.5, both variables have “bad” coefficients.
In 6.2x - y = 1, the y has a coefficient of -1. That’s where you want to start.
$6,000 - $4,000 = $2,000
$2,000/$25 = 80
Therefore, 80 people attended the game
Answer:
-2x^2
Step-by-step explanation:
all it is is adding like terms
-x^2 +2x -x^2 -2x
-2x^2
