How do you find the gcf

For what value of x does 4x = (1/8) x + 5?

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?