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OpenStudy (anonymous):
The cost of a toy car is $20 less than 2 times the cost of a toy train. If the cost of toy car is $100, what is the cost of toy train?
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OpenStudy (kc_kennylau):
Let the cost of a toy car and that of a toy train be c and t respectively.
OpenStudy (kc_kennylau):
Can you set two equations from that?
OpenStudy (texaschic101):
c = 2t - 20 c = 100 now just sub in 100 for c and solve for t
OpenStudy (texaschic101):
like this.. 100 = 2t - 20 do you know how to solve for t ??
OpenStudy (anonymous):
ok thank you i can do now
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OpenStudy (texaschic101):
YW :)
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