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rosijanka [135]
3 years ago
7

8) 7x + 2y = 24 8x + 2y = 30

Mathematics
1 answer:
Valentin [98]3 years ago
5 0

Answer:

x = 6 , y = -9

Step-by-step explanation:

7x + 2y = 24 ------------------- eq (1)

8x + 2y =30--------------------eq (2)

subtracting eq (1) from eq (2)

    8x + 2y = 30

    -7x - 2y =  -24

----------------------------

     x  - 0    =  6

hence x = 6

putting this value of x in eq (2) ,

=>  8 (6) + 2y = 30

=> 48 + 2y = 30

=> 2y = 30 - 48

=> y =  -18 / 2

=> y =  -9

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In order to solve this problem, we transform the statements into algebraic expressions. First, we assign the variables.

 

Let:

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For the first equation, we show that Gina’s number is greater than Sara’s number by 2. For the second equation, we show that the sum of both numbers is 68.

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3 years ago
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Answer: a = 3∛2

<u>Step-by-step explanation:</u>

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