Question

Solve the following equations. 1. r-2 = 7 2. y + 3 = 10 3. 6 =+2 3 17 4.- + x= 7 7 5. 6x = 12 6. t =10 5 sity 7. 2x = 18 3 у 8. 1.6 = 1.5 9. 7x-9 = 16y​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

1

Correct answer:

2

Explanation:

You can subtract the second equation from the first equation to eliminate y:

7x + y = 25 – 6x + y = 23: 7x – 6x = x; y – y = 0; 25 – 23 = 2

x = 2

You could also solve one equation for y and substitute that value in for y in the other equation:

6x + y = 23 → y = 23 – 6x.

7x + y = 25 → 7x + (23 – 6x) = 25 → x + 23 = 25 → x = 2

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Step-by-step explanation:

2Explanation:

We can add these equations to one another.

(7x + 3y = 20) + (–4x – 6y = 11) = (3x – 3y = 31)