Question 187895
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Let <font color=red>x</font>=son's age
And, <font color=red>x+20</font>= Mang Casar's Age


Condition: Mang Casar's Age + 5 years = 3 times (son's age + 5 years)
{{{x+20+5=3(x+5)}}}----> Working Eqn
{{{x+25=3x+15}}}
{{{25-15=3x-x}}}
{{{10=2x}}}------->{{{cross(10)5/cross(2)=cross(2)x/cross(2)}}}
<font color=red>x=5yrs</font>, Son's Age
5+20=<font color=red>25</font>, Mang Casar's Age
Check, go back Working Eqn:
{{{5+20+5=3(5+5)}}}
{{{30=3(10)}}}
{{{30=30}}}

Thank you,
Jojo</font>