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Arlecino [84]
3 years ago
10

-|5a+b| + |3y+2z|

Mathematics
1 answer:
mel-nik [20]3 years ago
5 0

Answer:

- 12.4

Step-by-step explanation:

Substitute the given values into the expression

- | 5(- 2) + (- 3) | + | 3(3) + 2(- 4.2) |

= - | - 10 - 3 | + | 9 - 8.4 |

= - | - 13 | + | 0.6 |

= - | 13 | + | 0.6 |

= - 13 + 0.6

= - 12.4

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~~~ 30 POINTS ~~~
trasher [3.6K]
<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>
3 0
3 years ago
Read 2 more answers
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