word problem solver

Question

Beth  is 7 years oldear than Darnell. Darnell is two times as old as Juan

. write formula that represents beths age in relation to juan

Answer 1

Let b = Beth, d = Darnell, j = Juan.

 

Beth is 7 years older than Darnell:

 

b = d + 7

 

Darnell is two times as old as Juan:

 

d = 2j

 

Beth's age in relation to juan (use substitution from the eq.2 to eq.1)

 

b = 2j + 7