Question

i have 136 people going on a zoo feild trip and 13$ for adult and 8$ for child cost them 1,163 . How many adults went and how many children went? I got -8x -8 = 1088 and 13x+8y=1163 5x=75 adults but cant figure out how they got the 1088 on that problem

Answer 1

you have a good start; two variables means you need two equations. Set x to adults, and y to children.

\[x+y=136\]
\[13x+8y=1163\]

Substitute the first equation into the second:
\[x = 136-y\]
\[13(136-y)+8y=1163\]
\[1768-13y+8y=1163\]
\[5y = 605\]
\[y = 121\]
\[x = 136 - 121 = 15\]

Answer 2

Damn sorry for double post! You should definitely understand the process now! haha

Answer 3

thanks alot for help

Answer 4

No problem