Help! Middle School math. Uggh. (1 Viewer)

T J

Footballguy

• Sep 4, 2017

• #1

I SUCK at math. Basic stuff? Ok, but my son is asking me how to help him create and solve an equation for this:

One month, Ruby worked 6 hours more than Isaac, and Svetlana worked 4 times as many hours as Ruby. Together they worked 126 hours. Find the number of hours each person worked.

I'm not sure so asking for help from those better at math than me. Need the equation too - not just answer.

thanks!

 

Mad Cow

Welshers and Dawdlers Beware!

• Sep 4, 2017

• #2

I + (I+6) + 4I = 126

 

Mad Cow

Welshers and Dawdlers Beware!

• Sep 4, 2017

• #3

I is Isaac.  I+6 is Ruby. 4I is Svetlana 

 

T J

Footballguy

• Sep 4, 2017

• #4

Mad Cow said:

I + (I+6) + 4I = 126

Click to expand...

Mad Cow said:

I + (I+6) + 4I = 126

Click to expand...

I did come up with that equation but not sure how to solve it. 

 

Mad Cow

Welshers and Dawdlers Beware!

• Sep 4, 2017

• #5

That goes to 6I + 6 = 126.

Subtract 6 from each side,  6I = 120

Isasc 20.  Ruby 26. Svetlana 80

 

nightmare

Footballguy

• Sep 4, 2017

• #6

Ruby 22, Isaac 16, Svetlana 88 

 

Mad Cow

Welshers and Dawdlers Beware!

• Sep 4, 2017

• #7

Khan Academy will be your friend

 

Mad Cow

Welshers and Dawdlers Beware!

• Sep 4, 2017

• #8

Doh.

I + (I+6) + 4 (I+6) = 126

 

Mad Cow

Welshers and Dawdlers Beware!

• Sep 4, 2017

• #9

I thought Svetlana was 4 times Issac. Reading ftw

 

Clown Car

Footballguy

• Sep 4, 2017

• #10

Don't use I as your variable though. It looks too much like 1. Use x. 

 

S

Sinn Fein

Footballguy

• Sep 4, 2017

• #11

T J said:

I SUCK at math. Basic stuff? Ok, but my son is asking me how to help him create and solve an equation for this:

One month, Ruby worked 6 hours more than Isaac, and Svetlana worked 4 times as many hours as Ruby. Together they worked 126 hours. Find the number of hours each person worked.

I'm not sure so asking for help from those better at math than me. Need the equation too - not just answer.

thanks!

Click to expand...

I

R = I +6 = Ruby worked 6 hours more than Isaac

S = 4(I + 6) =  4I +24 = Svetlana worked 4 times as many hours as Ruby

I + (I +6) + 4I + 24 = 126 = Together they worked 126 hours.

6I +30 = 126

6I = 96

I = 16

R = 22

S = 88

 

Last edited by a moderator: Sep 4, 2017

T J

Footballguy

• Sep 4, 2017

• #12

nightmare said:

Ruby 22, Isaac 16, Svetlana 88 

Click to expand...

How'd you get there? What did your equation look like. You and Mad Cow arrived at different answers.

 

T J

Footballguy

• Sep 4, 2017

• #13

Sinn Fein said:

I

R = I +6

S = 4(I + 6) =  4I +24

I + (I +6) + 4I + 24 = 126

6I +30 = 126

6I = 96

I = 13

R = 19

S = 76

Click to expand...

Has to equal 126 hours

 

S

Sinn Fein

Footballguy

• Sep 4, 2017

• #14

T J said:

Has to equal 126 hours

Click to expand...

fixed

 

T J

Footballguy

• Sep 4, 2017

• #15

Sinn Fein said:

fixed

Click to expand...

Perfecto.

 

T J

Footballguy

• Sep 4, 2017

• #16

Thank you all for taking the time to help out. Much appreciated.