
Tiffany L. answered 03/09/18
Tutor
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Fun Math Tutor- 14 Years of Experience!
6S + 7L = 203
1S + 6L = 145
Use elimination by multiplying the bottom equation by -6.
6S + 7L = 203
-6S - 36L = -870
Add the two equations together. The S-terms will cancel out leaving only L-terms.
-29L = -667
Divide both sides by -29.
L = 23 large balloons!
Now plug in the L into one of the original equations.
S + 6(23) = 145
S + 138 = 145 (Now subtract 138 from both sides to isolate the S)
S = 7 small balloons!
I hope this helps!!