Solve the system of linear equations by adding or subtracting.

Mathematics

1 answer:

Fantom [35]2 years ago

8 0

Answer:

3x + 7y = −17

4x − 7y = 10

Add up both sides of 2 equations, then

7x = -7

=> x = 1

=> y =(3 x 1 - 17)/7 = -14/7 = -2

Hope this helps!

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Brayden has 342 marbles in bags. If there are 9 marbles in each bag, how many bags of marbles does Brayden have If Brayden gives

Firlakuza [10]

Brayden has 38 bags.
After giving away 15 bags of marbles, Brayden is left with 23 bags.

To find out how many bags he has we do 342 divided by 9 which is 38.

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We then do 342 - 135 to find out how many marbles he has left which is 207 and divide 207 by 9 to convert that into bags, which is 23.

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2 years ago

HELP ASAP<br> What is the solution to the system of equations?<br> y = x + 3<br><br> y = -x-1

ASHA 777 [7]

Answer:

(A) Is right

Step-by-step explanation:

$y = x + 3 \\ y = - x - 1 \\ substitute \: y = - x - 1 \: in \: above \: eq \\ weget \\ - x - 1 = x + 3 \\ 2x = - 4\\ x = - 2 \\ \\$