Question 1132934
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The difference in their ages will always be 25 years.<br>
8 years ago, Mr. Santos was 7 more than 10 times as old as his son.  If x was his son's age then, his age then was 10x+7; then the difference in their ages was (10x+7)-x = 9x+7.<br>
So find when 9x+7 is equal to 25:<br>
{{{9x+7 = 25}}}<br>
Solve for x; that will be the son's age 8 years ago.<br>
Then add 8 to get the son's current age; then add 25 to get Mr Santos's current age.