Hi there! The first answer is correct.
You start with $5 and save $10 a week until you have at least $45. This situation is represented by the equation, because the variable 10w makes sense with this story and because we have a greater than or equal sign. This means that the left side of the inequality (the savings) must be greater than or equal to $45.
Answer:

Step-by-step explanation:
<u>Step 1: Expand the equation
</u>


<em>Foil</em>


<em>Combine</em>

Answer: 
X=-3 and y=5
2x+y=-1
-x+3y=18
3y-18=x
2(3y-18)+y=-1
6y-36+y=-1
7y=-1+36
7y=35
y=35/7
y=5
-x+3y=18
-x+3(5)=18
-x+15=18
-x=18-15
-x=3
x=-3