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Dafna1 [17]
3 years ago
13

Please Help!

Mathematics
1 answer:
svet-max [94.6K]3 years ago
6 0
First car is x
second car is y
25x+30y=1550
x+y=55
Multiply the second equation by -25 for elimination method to cancel out x
-25x-25y=-1375
Add the two equations
5y=175
y=35
Plug this value into the second equation
x+35=55
x=20

Final answers:
First car=20 gallons
Second car=35 gallons
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3 years ago
1. 3x + 12 = 8x - 18
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Answer:

  1. given
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  3. addition property of equality
  4. division property of equality
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Step-by-step explanation:

In step 2, -3x was added to both sides in accordance with the addition property of equality.

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The division property of equality lets you divide both sides of the equation by 5. (Or, the multiplication property lets you multiply by 1/5.)

Swapping sides of the equal sign is allowed by the symmetric property of equality.

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