Question

Please help
what is the solution to the system of equations?

5x - 3y = -9

2x - 5y = 4

( , )

Answer 1

@thomaster

Answer 2

@tester97

Answer 3

@tHe_FiZiCx99

Answer 4

@inkyvoyd

Answer 5

@Joel_the_boss

Answer 6

Do you know anything about this particular question? Is there a specific step you need help with?

Answer 7

i need to know how to change it so y is alone on one side

Answer 8

or the answer :)

Answer 9

Ok first you should add 3y to both sides \[5x=-9+3y\] Next just regroup the terms,\[5x=3y-9\] Next step would be to divide 5 on both sides, \[x=\frac{ 3y-9 }{ 5}\] After this Just factor out the common term 3, \[x=\frac{ 3(y-3) }{ 5}\]

Did that help? Are you beginning to understand?

Answer 10

yes kind of

Answer 11

but it dosent help me with the answer

Answer 12

there are 4 different ways to solve simultaneous equations but the goal is to find the set of values that will satisfy both equations at the same time.

Answer 13

Oh wait hehe, don't do that last step :P, I forgot its a system of equations, \[x=\frac{ 3y }{ 5}-\frac{ 9 }{ 5}\]That's x. :D Now, that you know this, plug that in for x to get y.

Answer 14

lol yeah i was getting confused

Answer 15

for this one let's use elimination
we want the coefficients of one variable to be equal and opposite so they cancel out.
this will give one equation with one unknown. solve for this variable then substitute in either of the original to find the value of the other variable

Answer 16

multiply the first equation by 2 and the 2nd equation by -5 what do you get?

Answer 17

can you show me im a little confused

Answer 18

which is the first equation

Answer 19

5x - 3y = -9

Answer 20

multiply each term by 2

Answer 21

10x - 6y = -18

Answer 22

lets name this equation 3

Answer 23

now multiply equation 2 by -5 and name that equation 4

Answer 24

2x - 5y = 4

-10 - 25 = -20

Answer 25

-10x - 25y = -20

Answer 26

good
do you see that the coefficients of x are equal and opposite for equations 3 and 4
add the equations together
and solve for y

Answer 27

how do i add them?

Answer 28

x - 19 = -2

Answer 29

is that right?