Question

solve by substitution 9xt5y=-4 x=34-5y

Answer 1

9x +5y = -4
x = 34-5y

??

Answer 2

yes thats it

Answer 3

ok since x is already solved for in bottom equation, substitute it into top equation
\[9(34-5y) +5y = -4\]
\[306-45y +5y = -4\]
\[-40y = -310\]
\[y = 310/40 = 31/4\]
then plug that into bottom equation to solve for x

Answer 4

it is an ordered pair correct?

Answer 5

yes, solution will be in the form (x,y)

Answer 6

x okay I give got an answer because all I get are -4, 13

Answer 7

give it another try
\[x = 34 - 5(\frac{31}{4})\]

Answer 8

29,7

Answer 9

sorry I am just dumb at this

Answer 10

where are you getting these numbers from?
well where are you struggling....break it down into simple steps
whats 5*(31/4) ?

Answer 11

31/20

Answer 12

think of the 5 as (5/1)
when you multiply fractions, multiply straight across, top times top, bottom times bottom
5*(31/4) = (5*31)/(1*4)
make sense?

Answer 13

first=155 second 4

Answer 14

good, next part subtracting fractions, common denominator of 4
34 - 155/4

Answer 15

I thought you did them top to bottom no wonder I am failing

Answer 16

30 151

Answer 17

no never do top to bottom when multiplying....you prob get confused with cross-multiplying when there is an equal sign
5/2 = 4/5

Answer 18

ok looks like you subtracted 4 from each number?

Answer 19

Never did any of this in school did not have to but yes I subt that way

Answer 20

so you don't know how to add/subtract fractions

Answer 21

nope

Answer 22

sorry you picked the dummy to help

Answer 23

no thats fine but you are going to need a lot of help, since it looks like you are in an algebra class....you can't do algebra before you know how to do fractions

Answer 24

thanks I tried to tell them that but, as you can see it did not work! I am doing online and am 50 yrs old so yeah I feel real stupid

Answer 25

oh well there are a lot of online resources and books on basic math so you can teach yourself and get caught up.
With fractions, just remember that the bottom number needs to be the same before you can add/subtract

\[\frac{34}{1} - \frac{155}{4}\]
change the 1st fraction so it has a 4 on bottom, do that by multiplying by (4/4)
\[\frac{34}{1}*\frac{4}{4} - \frac{155}{4}\]
\[\frac{136}{4} - \frac{155}{4}\]
now just subtract the top numbers and leave bottom alone
\[\frac{136}{4} -\frac{155}{4} = \frac{-19}{4}\]

Answer 26

solution: (-19/4, 31/4)

Answer 27

here is a website that might help you

http://www.mathexpression.com/learning-fractions.html