<PRE><B>Question 948941</B>
P = cost of pastry; C = cost of coffee=P+$0.75
P+C=$7.75 Substitute for C
P+P+$0.75=$7.75 Subtract $0.75 from each side.
2P=$7.00 Divide each side by 2. 
P=$3.50 ANSWER: A pastry costs $3.50
C=P+$0.75=$3.50+$0.75=$4.25 ANSWER: Coffee costs $4.25
CHECK:
P+C=$7.75
$3.50+$4.25=$7.75
$7.75=$7.75</PRE>