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Brums [2.3K]
3 years ago
9

Let n equal a certain number. If five times the sum of the number and -1 is equal to 15 less than the product of 3 and the numbe

r, what is n?
Solve A=P+PRT "for" P
Mathematics
1 answer:
Ivan3 years ago
3 0
5(n+(-1))=3n-15\\
5(n-1)=3n-15\\
5n-5=3n-15\\
5n-3n=-15+5\\
2n=-10\\
n=-5\\\\
A=P+PRT\\
A=P(1+RT)\\
P=\dfrac{A}{1+RT}
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Here x=3
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C.

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3 years ago
12x +10+3+8x ? What do I have to do ?
Annette [7]

Simplifying

12x + 10 + 3 + 8x = 0

Reorder the terms:

10 + 3 + 12x + 8x = 0

Combine like terms: 10 + 3 = 13

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13 + 20x = 0

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13 + 20x = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-13' to each side of the equation.

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