Question 891937
x age of woman
y age of son


NOW:
{{{x=y+27}}}


LATER:
{{{x+10=2*(y+10)}}}.
BOTH of them are each 10 years older.


Simplify the "later" equation; and then substitute for x and solve first for the value of y.
-
{{{x+10=2y+20}}}
{{{x-2y=20-10}}}
{{{x-2y=10}}}
-
{{{(y+27)-2y=10}}}
{{{y+27-2y=10}}}
{{{-y+27=10}}}
{{{y-27=10}}}
{{{highlight(y=37)}}}
.
.