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lozanna [386]
3 years ago
12

PLZ HELP I DONT UNDERSTAND PLZ

Mathematics
1 answer:
MariettaO [177]3 years ago
8 0
I think the answer is (-1,-3)

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Solving by elimination <br> 5x+2y= -3<br> 3x+3y=9<br> please help me solve x and y
-Dominant- [34]
1) -3(5x+2y=-3)⇒ -15x-6y=9
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2) -9x/-9=27/-9 ⇒ x=-3 

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Answer: (-3,6)

Reasoning:
Step 1) In order to eliminate, first I had to multiple the first equation by -3 and the second by 2 so that when combining the equations y would cancel each other out so that I could solve for x. <em>Note: There are many combinations as to how you could multiple the equations so that either the x or y would cancel out.
</em>
Step 2) Once y is eliminated, solve for x.

Step 3) Now plug x back into one of the original equations and solve for y. <em>Note: Plug x back into one of the original equations, not the equations that were changed by multiplication,</em> 

6 0
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of the 273 students in a school, 95 volunteered to work the book sale. About what percent of the students volunteered?
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28.7% to b exact
I hope this helped you
6 0
3 years ago
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