Example 2. At a restaurant one day. 60 sandwiches were sold in all. some on rye bread and 28 on white bread. The number of sandwiches sold on try bread was twice the number sold the day before. How many sandwiches on rye bread were sold the day before? So how many sandwiches on rye bread were sold the day before?​

ou would have 12 of each

the answer is ! ?

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116