Question 1175133

let Cesar ‘s age be {{{C}}} and Haley's age {{{H}}}

if Cesar is {{{18 }}} years younger than Haley, we have

{{{C=H-18}}}....eq.1

 if {{{7}}} years ago, Haley's age was {{{2}}} times Cesar's age, we have

{{{H-7=2(C-7)}}}....eq.2......substitute {{{C}}}
{{{H-7=2(H-18-7)}}}
{{{H-7=2(H-25)}}}
{{{H-7=2H-50}}}
{{{50-7=2H-H}}}
{{{43=H}}}

go to
{{{C=H-18}}}....eq.1....substitute {{{H}}}
{{{C=43-18}}}
{{{C=25}}}

answer: Cesar is {{{25}}} years old now