Manuel is 42 years younger than Rosa. 6 years ago, Rosa's age was 3 times Manuel's age. How old is Manuel now?

Question

algebra 

Answer 1

we can tart off by assigning M & R as variables for Michael and Rosa's present age.

 

M = R - 42

 

R - 6 = 3 (M-6)

 

R = 3M - 12

 

Substitute the value that we have for R into the first equation and solve for M

 

M = (3M-12) - 42

 

2M = 54

 

M = 27

 

plug  this value for M in the second equation and calculate R.

 

Michael's current age is 27 and Rosa's age is 69.