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Sindrei [870]
3 years ago
9

How many solutions does the system have?

Mathematics
1 answer:
alisha [4.7K]3 years ago
6 0

Answer:

y = 3/2 , x = 3/2

Step-by-step explanation:

Solve the following system:

{x + y = 3 | (equation 1)

10 x = 15 | (equation 2)

Divide equation 2 by 5:

{y + x = 3 | (equation 1)

0 y+2 x = 3 | (equation 2)

Divide equation 2 by 2:

{y + x = 3 | (equation 1)

0 y+x = 3/2 | (equation 2)

Subtract equation 2 from equation 1:

{y+0 x = 3/2 | (equation 1)

0 y+x = 3/2 | (equation 2)

Collect results:

Answer: {y = 3/2 , x = 3/2

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Step 1 : Simplify both sides
-5(6a+21)=-15
(-5)(6a)+(-5)(21)=-15
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Step 2 : Add 105 to both sides
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Step 3 : Divide both sides by -30
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3 years ago
There is a total of 270 men, women and children on a train.
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Because the ratio of women to children is 10:1, double the ratio of men to women so the women are both 10:

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Now total the 3 ratios: 8 for men, 10, for women and 9 for children:

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Step-by-step explanation:

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