SOLUTION: RaTa= 160, RbTb= 240, Rb=2Ra, Ta+Tb=7
Solve? I'm not sure how to do this... help? Thanks!!
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Question 146507: RaTa= 160, RbTb= 240, Rb=2Ra, Ta+Tb=7
Solve? I'm not sure how to do this... help? Thanks!!
Found 2 solutions by jim_thompson5910, scott8148:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the first equation
Solve for
Move onto the last equation
Solve for
Now move onto the second equation
Plug in
Plug in
Multiply and simplify
Plug in
Distribute
Multiply every term by the LCD
Add to both sides
Combine like terms
Divide both sides by 560 to isolate . So the first answer is
Go back to the last equation
Plug in
Solve for
From here it's not too difficult to find and . So I'll let you finish.
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
substituting __ (2Ra)Tb=240 __ dividing by 2 __ RaTb=120
adding __ RaTa+RaTb=160+120 __ factoring __ Ra(Ta+Tb)=280
substituting __ Ra(7)=280 __ dividing by 7 __ Ra=40
substituting __ (40)Ta=160 __ dividing by 40 __ Ta=4
substituting __ (4)+Tb=7 __ subtracting 4 __ Tb=3
substituting __ Rb=2(40) __ Rb=80
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