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2 years ago

7(2x−a)−3(4x−a)−5(3x+2a)+a=0.

Mathematics

1 answer:

Luden [163]2 years ago

5 0

Answer:

Step-by-step explanation:

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Kaitlin, Tony, and Austin sent a total of 103 text messages over their cell phones during the weekend. Austin sent 4 times as ma

emmainna [20.7K]

The number of messages Kaitlyn, Tony and Austin sent are 13, 18 and 72 messages respectively.

<h3>How to write and solve equation?</h3>

let

Number of messages Kaitlyn sent = x
Number of messages Tony sent = x + 5
Number of messages Austin sent = 4(x + 5)
Total messages = 103

103 = x + (x + 5) + 4(x + 5)

103 = x + x + 5 + 4x + 20

103 = 6x + 25

103 - 25 = 6x

78 = 6x

x = 78/6

x = 13

Number of messages each sent:

Number of messages Kaitlyn sent = x

= 13 messages

Number of messages Tony sent = x + 5

= 13 + 5

= 18 messages

Number of messages Austin sent = 4(x + 5)

= 4(13 + 5)

= 4(18)

= 72 messages

Learn more about equation:

brainly.com/question/2972832

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3 0

1 year ago

Solve for h..-6.2h - 1.2= 0.86

Arada [10]

Answer:

Step-by-step explanation:

-6.2h-1.2=0.86

-6.2h=2.06

h=-103/310

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3 years ago

I want to get rid of my points and give back to the community of brainly its helped me so much and i and just wanted to say than

Ede4ka [16]

Answer:

TYSM>> I LOVE YOU>> AS A BRAINLY FRIEND

Step-by-step explanation:

6 0

3 years ago

Tan39= x/68<br> Plz help. Will give brainliet

lesya [120]

Answer:

$\huge\boxed{x \approx 55}$

Step-by-step explanation:

We need to note that this is an equation, in which we can solve for x.

$tan(39) = \frac{x}{68}$

We can use a calculator to find the tangent of 39 - we type 39 into the calculator then press the "TAN" button to find it's tangent. We find that to be around 0.81.

We now have the formula simplified down to $0.81 = \frac{x}{68}$ . To solve for x, we want to isolate it on one side, so we can multiply both sides by 68 to get rid of the fraction.