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Anonymous Anonymous
  • 30-01-2017
  • Mathematics
Answered

How many solutions does the system of equations have 3x+15y=35 and y=-1/5x+7/3


one

two

infinatly many

none

Verified Answer :

David1993
David1993 David1993
  • 30-01-2017

We can to make the method of substitution.

Look:

3x + 15y = 35

Isolating 3x

15y = 35 - 3x

Dividing both the sides by 15

y = 35/15 - 3x/15

Simpliting:

y = 7/3 - x/5

Now let's equate this expression with the other

7/3 - x/5 = - x/5 + 7/3

0 = 0

Oh noOo!

There is solution infinatly to this question!

Because, the two equation are the same.


Hope this helps!

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