world problem

1. A tv costs $30 less than twice the cost of a VCR. If a VCR costs $120, what is the cost of a TV?
2.If a TV costs $150 , what is the cost of a VCR?
3. Write an equation using the prices of the VCR and TV. Use v for the price of the VCR. Use t for the price of the TV.

Quote:

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Originally Posted by star29867

1. A tv costs $30 less than twice the cost of a VCR. If a VCR costs $120, what is the cost of a TV?
2.If a TV costs $150 , what is the cost of a VCR?
3. Write an equation using the prices of the VCR and TV. Use v for the price of the VCR. Use t for the price of the TV.

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Do the last part first:

t=2v-30.

Now the rest is obvious, just substitute in the given values of v for the
first, and for the second rearrange the equation to:

v=(t+30)/2.

RonL