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Dafna1 [17]
3 years ago
7

Need help to solve Solving system of equation by Substitution method ( standard form)

Mathematics
1 answer:
EleoNora [17]3 years ago
7 0
Y- -7-23
3x-4y= 30


3x-4(-7x-23)=30
3x+28x+92=30 -4 multiplied by -7x and -23 is a positive outcome not negative
31x+92=30
31x=30-92
31x=-62
x= -62/31
x= 2

I think this is the answer, I am a little rusty in the substitution method
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3 years ago
What can you simplify 12+3(18-42)+9
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-51

Step-by-step explanation:

<u>Step 1:  Solve inside the parenthesis</u>

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5 0
3 years ago
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5 questions and if you answer then you will get points, Brainliest answer, thanks, and 5-star rating thx
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