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3 years ago

Solve the equation by combining like terms: 3x-5+12-2x=12

Mathematics

2 answers:

lys-0071 [83]3 years ago

8 0

Answer:

482

Step-by-step explanation:

3x-5=178+12=82-22x=482

trapecia [35]3 years ago

5 0

3x-5+12-2x=12
X+7=12 (by combining like terms you have your X’s and your regular numbers. So in this equation we have 3x and -2x as like terms and -5 and 12 as like terms. We combine them to simplify the equation. So by combing 3x and -2x, 3+(-2x), we get 1x or just x. Then we combine -5 and 12, -5+12=7).
X+7=12
-7 -7
X=5
Good luck and I hope this helps!

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Add the fractions and simplify the answer 1/2 +2 /3

IrinaVladis [17]

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4 0

3 years ago

Read 2 more answers

A druggist needs 25 liters of a solution that is 16% iodine. She has one solution that is 12 % iodine and another that is 37 %.

GalinKa [24]

Answer:

21 liters of the 12% solution and 4 liters of the 37% solution

Step-by-step explanation:

Represent the number of liters of the first solution as x and the second as y. Now, the total liters of iodine is going to be 16% of 25 = 4 liters of iodine, and the total liters of each solution is going to be 25. Now, we can setup two equations:

0.12x+0.37y = 4

x + y = 25

Multiplying the bottom equation by 0.12, we have

0.12x + 0.12y = 3

Subtracting, we have

0.12x+0.37y=4

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= y = 4

= x = 25 - 4 = 21

7 0

2 years ago

The cost to a store for an MP3 player is $60. The selling price is $105. A classmate says that the markup is 175% because $105$6

blsea [12.9K]

It is given that the cost price of the MP3 player is $60 and the selling price is $105.

The markup is given by the formula:

Markup = $\frac{S.P.}{C.P.} (100)$

= $\frac{105}{60} (100)$

= 1.75 × 100

= 175%

Yes, the classmate is correct.

Hence, the markup is 175% and the classmate is correct.

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3 years ago

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gtnhenbr [62]

Answer:

A. -2, 9

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4 years ago

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Elodia [21]

Answer:

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Step-by-step explanation:

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4 years ago