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Mila [183]
3 years ago
13

-7a-10=20-3a please show work help

Mathematics
1 answer:
olga_2 [115]3 years ago
7 0
-7a-10=20-3a

Combine like terms:
-4a -10 = 20
-4a = 30

Solve for a:
a =  -\frac{30}{4} = -7.5

Your answer: a = -7.5
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Step-by-step explanation:

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Lets do

\\ \sf\longmapsto K=\dfrac{AB}{A+B}

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\\ \sf\longmapsto \dfrac{1}{B}=\dfrac{1}{K}-\dfrac{1}{A}

\\ \sf\longmapsto \dfrac{1}{B}=\dfrac{K-A}{AK}

\\ \sf\longmapsto B=\dfrac{AK}{K-A}

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2 years ago
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Your format is not placed correctly. It seems like you just copied and pasted your question into brainly. Try to make the question again.

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