<span>The first equation is
x + y = 27
For the second equation, there are twice as many girls (y) as boys (x), so you write:
y = 2x
Now you have a system of equations:
x + y = 27
y = 2x</span>
Answer:
unit rate: (1,1)
Step-by-step explanation:
45 is if you x it so it’s 45
Answer:
x = ± 6
Step-by-step explanation:
To find x in an equation, isolate it. Whatever you do to one side, do to the other.
In this case, we need to find the square root of both sides in order to have
become
and find the variable's value:

The square root of 36 can be both -6 and 6. (Remember that when finding the square root of a positive number, it will have a negative and positive outcome.) So, x = -6 and 6.