document.write( "Question 1173370: Three pizzas and four sandwiches cost $34. Three pizzas and seven sandwiches cost $41.50. How much does a pizza and a sandwich cost? \n" ); document.write( "

Algebra.Com's Answer #798593 by math_helper(2461) $\"\"$ $\"About$

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document.write( "3P + 4S = 34
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document.write( "3P + 7S = 41.50
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document.write( "     3S =  7.50     << subtracted 1st eqn from 2nd eqn\r
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document.write( "S = 2.50 -->  P = 8.00\r
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