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kobusy [5.1K]
2 years ago
14

Help help help math math

Mathematics
2 answers:
Salsk061 [2.6K]2 years ago
8 0
Add x to both sides.

y = -x + 15 —> y + x = 15

So, the final answer is x + y = 15.
kiruha [24]2 years ago
3 0

Answer:

add x to both sides. once you do this, you will get x+y=15

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A number multiplied by -7, subtracted drom the sum of 7 and five times athe number
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1) B- Substitution

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Step-by-step explanation:

1)

x+3y=7

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2)

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Step-by-step explanation:

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5 0
3 years ago
Gabrielle's age is three times Mikhail's age. The sum of their ages is 20. What is Mikhail's age?
PtichkaEL [24]

Answer:

Mikhail is 5 years old

Step-by-step explanation:

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Substitute 3Y into the first equation (simultaneous equation)

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To check your answer.

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Answer:

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