Question

Please help, I need correct answers
Brad can make 4 key chains in an hour. Velma can make only 3 key chains in an hour, but she already has 6 completed key chains. Explain to Brad how he can use a system of equations to determine when he will have the same number of key chains as Velma. Use complete sentences.

Answer 1

let t= time in hours, b= no of keychains made by brad, v=no of keychains made by velma.
b=4t
v=3t+6

equate b and v to get time t when they have equal keychains.

so, 4t=3t+6
so, t=6 hours