Question

Help please?
Solve by the elimination method.
4a + 4b =8
-4a + b =37
Is there a solution (type an ordered pair), infinitely many solutions, or no solutions?

Answer 1

4(a+b) = 8
a+b = 4
subtract in second equation:
-5a = 33
a = 33/-5
Therefore b = 8.6

Answer 2

4a + 4b =8
+ -4a + b =37
------------------
5b = 45
--- ---
5 5
------------------
b = 9

Answer 3

how do I type an ordered pair for these equations?

Answer 4

There must be a few solutions

Answer 5

Well that one I got incorrect, so I need to do a similar excercise, what i'm looking for is to be shown how to do these step by step so I can learn the process myself, can you help me?
Here is the next equation..
4a + 5b =13
-4a +b =17

Answer 6

b=9
4a + 4b =8
4a+4(9)=8
4a=-28
a=-7
Ordered pair is (-7,9)

Answer 7

Can you help me rework the next equation that I listed?
4a + 5b =13
-4a +b =17

Answer 8

4a + 5b =13
+ -4a +b =17
-----------------
6b=30
b=5
4a+5(5)=13
4a+25=13
4a=-12
a=-3
(-3,5)

Answer 9

Thank you Grazes & Violy. I appreciate the help.

Answer 10

np.