document.write( "Question 612338: the spanish class was having a fiesta for the end of the year and they ordered tacos from a local restaurant. The tacos cost $.60 each and the enchiladas cost $1.25 each. They ordered 15 more than enchiladas and the total bill was $64.50. how many of each did they order? \n" ); document.write( "

Algebra.Com's Answer #385355 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+a+\"$ = number of enchilada's ordered
\n" ); document.write( "Let $\"+b+\"$ = number of tacos ordered
\n" ); document.write( "given:
\n" ); document.write( " $\"+1.25a+\"$ = cost of enchilada's
\n" ); document.write( " $\"+.6b+\"$ = cost of tacos
\n" ); document.write( "----------------
\n" ); document.write( "(1) $\"+1.25a+%2B+.6b+=+64.5+\"$
\n" ); document.write( "(2) $\"+b+=+a+%2B+15+\"$
\n" ); document.write( "Substitute (2) into (1)
\n" ); document.write( "(1) $\"+1.25a+%2B+.6%2A%28+a+%2B+15+%29+=+64.5+\"$
\n" ); document.write( "(1) $\"+1.25a+%2B+.6a+%2B+9+=+64.5+\"$
\n" ); document.write( "(1) $\"+1.85a+=+64.5+-+9+\"$
\n" ); document.write( "(1) $\"+1.85a+=+55.5+\"$
\n" ); document.write( "(1) $\"+a+=+55.5+%2F+1.85+\"$
\n" ); document.write( "(1) $\"+a+=+30+\"$
\n" ); document.write( "and, since
\n" ); document.write( "(2) $\"+b+=+a+%2B+15+\"$
\n" ); document.write( "(2) $\"+b+=+45+\"$
\n" ); document.write( "They ordered 30 tacos and 45 enchiladas
\n" ); document.write( "check:
\n" ); document.write( "(1) $\"+1.25%2A30+%2B+.6%2A45+=+64.5+\"$
\n" ); document.write( "(1) $\"+37.5+%2B+27+=+64.5+\"$
\n" ); document.write( "(1) $\"+64.5+=+64.5+\"$
\n" ); document.write( "OK\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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