Question 1105692
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Your work and your equation are fine.  You don't show us what you did to try to solve the equation, so we don't know why you couldn't solve the problem.<br>
{{{a+3a+3a-8+(3a-8)/4 = 145}}}
{{{7a-8+(3/4)a-2 = 145}}}<br>
Did you get that far with your work?
Can you finish from there?<br>
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Added 1/4/2018...<br>
{{{a+3a+3a-8+(3a-8)/4 = 145}}}
{{{7a-8+(3/4)a-2 = 145}}}<br>
{{{7a+(3/4)a = 155}}}
{{{(31/4)a = 155}}}
{{{31a = 620}}}
{{{a = 20}}}<br>
The ages are...
Ann = a = 20
Jeff = 3a = 60
Trudy = 3a-8 = 52
Harry = (3a-8)/4 = 13