Dina goes to a carnival. The rides with a height requirement cost 3 tickets and the rides without a height requirement cost 4 tickets. Dina is tall enough to go on all the
rides. She has 24 tickets in total.
How many of each type of ride can Dina go on using all 24 tickets?

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