10 POINTS!!!
1 answer:
Let g, b, t represent the numbers of good, better, best tires sold. The problem statement gives rise to 3 equations.
.. 106g +156b +190t = 233,480
.. g -3t = 0
.. b -2.5t = 0
You can put these equations into your friendly equation solver to find
.. g = 780
.. b = 650
.. t = 260 (no rounding necessary)
780 good tires were sold
650 better tires were sold
260 best tires were sold
_____
If you want to solve these equations "by hand," substitution will work well. Substitute for b and g and solve for t. Then the values of b and g fall out immediately.
.. 106(3t) +156(2.5t) +190t = 233480
.. 106g +156b +190t = 233,480
.. g -3t = 0
.. b -2.5t = 0
You can put these equations into your friendly equation solver to find
.. g = 780
.. b = 650
.. t = 260 (no rounding necessary)
780 good tires were sold
650 better tires were sold
260 best tires were sold
_____
If you want to solve these equations "by hand," substitution will work well. Substitute for b and g and solve for t. Then the values of b and g fall out immediately.
.. 106(3t) +156(2.5t) +190t = 233480
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