SOLUTION: solve using elimination or substitution
5/3 d - 3/5 g = 61
3/5 d + 5/3 g = -91
Having trouble clearing the fractions. I used 15 as the LCD and got
25d -9g =915
9d + 2
Algebra ->
Coordinate Systems and Linear Equations
-> SOLUTION: solve using elimination or substitution
5/3 d - 3/5 g = 61
3/5 d + 5/3 g = -91
Having trouble clearing the fractions. I used 15 as the LCD and got
25d -9g =915
9d + 2
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Question 661014: solve using elimination or substitution
5/3 d - 3/5 g = 61
3/5 d + 5/3 g = -91
Having trouble clearing the fractions. I used 15 as the LCD and got
25d -9g =915
9d + 25g = -1365
but then I get weird numbers from there... Answer by Edwin McCravy(20056) (Show Source):
25d - 9g = 915
9d + 25g = -1365
Multiply the first equation through by 25
Multiply the second equation through by 9
625d - 225g = 22875
81d + 225g = -12285
Add them term by term and get
706d = 10590
d = 15
Substitute in
9d + 25g = -1365
9(15) + 25g = -1365
135 + 25g = -1365
25g = -1500
g = -60
Edwin
