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Vlada [557]
2 years ago
11

Need help with finding the value of x:-

x" alt="7x-4=3+8x" align="absmiddle" class="latex-formula">
Mathematics
2 answers:
kiruha [24]2 years ago
5 0

\underline{\boxed{\red{\:Solution}}}

==> 7x - 4 = 3 + 8x

==> 8x - 7x = -4 - 3

==> x = -7 [ Ans ]

Phoenix [80]2 years ago
3 0

The value of x in the equation is -7

<h3>What is an algebraic equation?</h3>

An algebraic equation is an expression that consists of numbers, variables with their arithmetic operations.

From the given algebraic equation:

7x - 4 = 3 + 8x

By collecting the like terms, we have:

7x - 8x = 3 + 4

-x = 7

Multiply both sides by (-) sign,

x = - 7

Learn more about algebraic equations here:

brainly.com/question/4344214

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A video game system and several games are sold for $ 648. The cost of the games is 3 times as much as the cost of the system. Fi
podryga [215]

First set up the equation.

x + 3x = 648

Then solve for x.

4x = 648

Divide both sides by 4.

x = 162.  So the answer for the system would be $162 and the price for the games would be $486.  Add the two up to check your work and you will get $648.  Hope this helped!

-TTL

5 0
3 years ago
Find the magnitude of the vector with (-7, -5) and write the vector as the sum of unit vectors.
Lesechka [4]
The magnitude of vector (-7,-5) =
                         = \sqrt{ (-7)^{2} + (-5)^{2} } = \sqrt{74} = 8.6

<span>vector as the sum of unit vectors = -7 i - 5 j</span>
4 0
2 years ago
Read 2 more answers
Find the value of the following.<br> (a) 180 % of 200g
Natasha_Volkova [10]

Answer:

\frac{180| }{100}  \times 200 = 360

3 0
2 years ago
Read 2 more answers
All of them plz I need help if ur older Shouldnt be hard
vfiekz [6]

Answer:

The answer for number 1 would be 57 dollars and 80 cents

Number two would be little ceasars

Number 3 would be 75 dollars and 60 cent

Number 4 would be 40 dollars and 80 cent

Number 5 would be 110 dollars and 98 cents

Step-by-step explanation:

Because of you take 68 and times it by 15% which would be .15 you would get 10.2 you would then take 68 and subtract 10.2 from it and get 57.8

Number 2: take 7.50 times it by .3 and you get 2.25 then subtract 2.25 from 7.50 and you get 5.25 so even with the coupon little ceasars pizza is still 25cent cheaper

Number 3: add 42 to 28 and you get 70. 8% of 70 is 5.6 so add 5.6 to 70 and you have your answer of 75.60

Number 4: 35.48 is the price alone. Times that number by .15 and you get 5.322. Add 35.48 and 5.322 to get 40.802 but for money wise you just need the 40.80

Number 5: 118 one again is the price standing alone but 118 multiplied by .10 is 11.8 so subtract 11.8 from 118 and you get 106.2 but there is still a sales tax. So 106.2 times .045 or 4.5% would be 4.779, add that number to 106.2 and you get 110.979. Now the problem did not say anything about rounding but the 9 would make the 7 an 8 so of you do that you get 110.98.

So to help you in the future when dealing with percentages with discounts and tax’s. if it’s a discount once you times the original number by the percentage you subtract the sum from the original number. As for taxes you do the same process but instead of subtracting you add

5 0
2 years ago
2/5of a number is 80. What is 34of the same number?
Masja [62]

Answer:

150

Step-by-step explanation:

First you have to find what number 80 is 2/5 of, to do this do the reciprocal of 2/5 which would be 5/2. Multiply 80 by 5/2 and you'll get 200, then find what 3/4 of 200. Multiply 200 by 3, then divide by 4 to get the answer of 150.

3 0
3 years ago
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