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elena-14-01-66 [18.8K]
3 years ago
13

Help please k/2+9=30

Mathematics
1 answer:
Dafna11 [192]3 years ago
5 0
\frac{k}{2}+9=30\ \ \ | subtract\ 9\\\\
\frac{k}{2}=21\ \ \ | multiply\ by\ 2\\\\
k=42\\\\Solution\ is\ 42.
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Answer:

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Step-by-step explanation:

x+8=-3

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since we are adding two negative numbers, we will let the number be negative but add them.

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Hope it helps :)

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3x-2y=-39 and x+3y=31 solution using elimination
Kobotan [32]
This is hard to write... I hope this makes sense to you...
3x-2y=-39
x+3y= 31
We want to use elimination therefor, we need to either get our x or our y to add together to get zero. 
To do this, we will multiply -3 to (x=3y=31) 
NEW EQUATION
3x-2y=-39 PLUS
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Answer: -11y= -54 
y= 4.9
Plug in to solve for x (put new y in)
3x-2(4.9)=-39
x= -9.73 
5 0
4 years ago
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