Question 1196451
Juan is age 2j.
Jose is age j.
In five years, {{{2j+5=(1&1/2)(j+5)+(j+5)}}}


{{{2j+5=(2&1/2)(j+5)}}}

{{{2j+5=(5/2)(j+5)}}}


{{{4j+10=5(j+5)}}}

{{{4j+10=5j+25}}}

{{{-15=j}}}
Your problem is faulty.


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IF problem said, "... he will be 1&1/2 times as old as Jose"
THEN  {{{2j+5=(3/2)(j+5)}}}


{{{4j+10=3j+15}}}

{{{j=5}}}