Answer: (5,20)
Let’s start by rewriting the equations
x+y=5x
-y=-7-11-2
Since the value of y cannot be negative, let’s turn this positive by multiplying each number by -1.
-1 (-y=-7-11-2)
y=7+11+2
Now let’s determine what method we would like to use to solve
When solving a system of equations, you can use one of three methods:
1) Graphing
2) Substitution
3) Elimination
Seeing that we already know how to find y, let’s solve this using the substitution method.
We’re going to start by substituting y into the second equation and solving
x+ 7+11+2=5x
*add 7,11, and 2)
x+20=5x
*subtract x on both sides*
20=4x
*divide both numbers by 4*
5=x
Now that we have x, we have the first number of the ordered pair. It is currently: (5,20)
We found y by adding all the numbers, and found x by solving the equation
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