You flip a coin three times in a row. What is the probability you will get three tails?
2 answers:
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Answer:
Step one. Equate the two right hand sides to each other.
3x - 4 = 2x + 1
Step-by-step explanation:
Well one of the things you could do is graph the two equations. The intersection point is the solution to the system. We get 5,11 as the answer. I can hear you saying that's cheating, and it likely is, but it does get the answer.
The very first step without the graph is to equate each of the right hand sides to each other. That's because the left side are both ys and they have to be equal.
3x - 4 = 2x + 1 Add 4 to both sides
3x - 4 + 4 = 2x + 1 + 4
3x = 2x + 5 Subtract 2x from both sides
3x-2x = 2x-2x + 5 Combine
x = 5
y = 3x - 4
y = 3*5 - 4
y = 15 - 4
y = 11.
