Question

Solve this system of equations using any method.

2x – y = 5
4x + y = 7


(4, –3)
(4, –9)
(2, –1)
(2, –4)

:)

Answer 1

Add the two functions together to determine x.

Answer 2

http://www.mathpapa.com/algebra-calculator.html
here it shows you how

Answer 3

y=2y-5
y=7-4x

Answer 4

7-4x=2x-5

Answer 5

12=6x
x=2

Answer 6

y=-1

Answer 7

(2, -1)

Answer 8

That is what i thought. Thank you!

Answer 9

Each small kite costs $4, while each large kite costs $7. If the total money collected selling kites is $150, and 30 kites are sold, which system of equations can be used to find out how many of each size kite are sold?

Let s be the small kites and l be the number of large kites.

Answer 10

What about that one?

Answer 11

4s+7l=150
l+s=30

Answer 12

l=30-s
4s+7*(30-s)=150