Jenny biked 3 miles less than twice the number of miles Marcus biked. Jenny biked a total of 4 miles. Write an equation to determine how many miles Marcus biked.

Answer: Marcus biked 3.5 miles.

Step-by-step explanation: To determine how many miles did Marcus bike, we need to write an equation that expresses the given data, we know that Jenny biked 4 miles, and that number needs to be 3 miles less than twice the distance that Marcus biked so:

x is the number of miles that Marcus biked:

2x-3=4 (twice the distance Marcus biked, minus 3 miles, equals the distance Jenny biked)

now, we isolate the x:

2x=4+3

2x=7

x=7/2

x=3.5 miles

3 - 2x = 4

Step-by-step explanation:

let the number of miles biked by marcus be x, then jenny biked 3 miles less than marcus therefore it will be 3 - x therefore the total miles for jenny will be 3 - x = 4