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ankoles [38]
4 years ago
7

Solve for system of equations −3y−4x=−11 3y−5x=−61 ​

Mathematics
1 answer:
Firlakuza [10]4 years ago
6 0
X= 8
Y= -7

If you use elimination:

–3y–4x=–11
3y–5x=–61

Add the two equations and get

–9x=–72

Divide by –9 on both sides

X=8

Substitute 8 in for x

–3y–4(8)=–11

Simplify

–3y–32=–11

Add 32 on both sides

–3y=21

Divide by –3 on both sides

Y=–7
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How do you identify the information that is given to you that you dont need for solving a problem?
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When reading a question, you need to be aware of the numbers presented and the facts. You need to pay attention to the question - what, when, where, how, why or how much. What is being asked in the question is always your clue. Unnecessary information will be eliminated once you understand the question.

Simple example from a Business book:

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It is pretty obvious but try to recognize the important facts from the rest.
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3 years ago
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