Mira has $760 in her bank account and withdraws $40 each month. Paulina has $210 in her bank account and deposits $70 each month.?

760 - 40m = 210 + 70m

Subtract 210 from both sides
550 - 40m = 70m

Add 40m to both sides
550 = 110m

Divide both sides by 110
5 = m
m = 5

They will have equal amounts in 5 months <----