What should you multiply the first equation (top equation) by in order to eliminate the variable x when the two equations are added together? 3x-y=1 -12x+y=7

What is the binomial expansion of (2x-3)^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

How do you solving the solution of each system using elimination?