11-2x+4=8+5x is one real soluction, no real soluction or infinite real soluction

Germaine walks at the rate of 10 feet every five seconds while nolan walks at the rate of 15 feet every five seconds. if germaine has a head start of 25 feet, how many seconds will they be at the same spot?

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Find the value of x. give reasons to justify your solutions! l, m ∈ kn