Marko has 45 comic books in his collection, and Tamara has 61 comic books. Marko buys 4 new comic books each month and Tamara buys 2 comic books each month. After how many months will Marko and Tamara have the same number of comic books?

hi

Write 2 equations, multiply amount bought per month by number of months and add to the starting values :

Marko = 45 + 4M

Tamara = 61 + 2M

Set the equations equal to each other and solve for number of months:

45 + 4m = 61 + 2m

Subtract 45 from both sides:

4m = 16 + 2m

Subtract 2m from both sides:

2m = 16

Divide both sides by 2:

m = 8

8 months

b. astronomers

step-by-step explanation:

i'm pretty sure it would take 20 hours because it's half the men so you multiply the number of hours it takes by 2