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marysya [2.9K]
3 years ago
13

~~~ 30 POINTS ~~~

Mathematics
2 answers:
frez [133]3 years ago
5 0
Let x be the unknown number of all 3 equations
1.) 3x - 2 = x + 10 x=6
2.) x + 4 = 19 - 2x x=5
3.) 8x - 20 = x + 15 x=5
trasher [3.6K]3 years ago
3 0
<span>1)   3x-2=x+10


</span><span>Now, lets solve this step-by-step.
</span><span>
3x - 2 = x + 10
-x             -x
</span><span>
</span><span>3x - x = 2x                                2x - 2 = 10
</span><span>
</span><span>2x - 2 = 10
</span>2x - 2+2 = 10+2          The inverse operation helps isolate the variable. 
<span>
2x = 12

2x/2 = 12/2

x = 12/2
x = 6</span><span>

Answer: x = 6

2) x + 4 = 19 - 2x </span>

We can solve this much faster

x + 4 = 19 - 2x
                  +2x

x+2x = 3x

3x + 4 = 19
      -4     -4

19-4 = 15

3x= 15
3x/3 = 15/3
x= 5

Answer: x = 5

3) 
<span>8x - 20 = x + 15

Much faster now!!

8x - 20 = x + 15
               -x
8x-x = 7x

7x - 20 = 15
      +20   +20
15+20 = 35

7x = 35
7x/7 = 35/7
x = 35/7
x = 5

Answer: x= 5</span>
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ikadub [295]

Answer:

<h3>              -58, -57, -56</h3>

Step-by-step explanation:

x       - the first of consecutive integers

x+1   - the second of consecutive integers

x+2  - the third of consecutive integers

x+x+2  - sum of the first and third integers

3(x+x+2)  - three times the sum of the first and third integers

3(x+x+2) = -342

  ÷3             ÷3

2x + 2 = -114

  -2            -2

 2x = -116

 ÷2     ÷2

   x = -58

x+1 = -58 + 1 = -57

x+2 = -58 + 2 = -56

3 0
3 years ago
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Answer:

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Step-by-step explanation:

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so 2.5 serving has

2.5×95= 237.5

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Answer:

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(Hope this helps!! Btw, I am the first to answer.)

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Step-by-step explanation:

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