Answer:
For #4, the best way to solve this question is to actually solve it. Instead of having to guess the steps, you do the problem! I won't give you the actual answers but give you helpful hints. Check out the step by step.
Explanation:
- There are three methods to solving system of equations:
Graphing:
You can use y = mx + b
So if it's in x = 2y + 4 for example, you would switch the 2y and x, etc.
Then graph the other, until you see where it intersects on the graph at (x,y).
Substitution:
Isolate one and then plug it into the other variable
ie. y = 2x + 4
2y + 5
2(2x + 4) + 5
Subtraction:
Take one the variables and subtract one of the values out completely so that they become equal to each other.
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One solution: must intersect at one point
Infinite solution: On the same line
No solution: they never intersect and are parallel
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Also, remember PEMDAS when solving for your order of operations. Good luck!