<PRE><B>Question 1164747</B>
&lt;br&gt;
x = Robert&#39;s age
y = his father&#39;s age
70 = his grandfather&#39;s age&lt;br&gt;
(1) His grandfather&#39;s age, 70, is 4 less than twice his father&#39;s age:&lt;br&gt;
{{{70 = 2y-4}}}&lt;br&gt;
Solve to find his father&#39;s age, y.&lt;br&gt;
(2) Robert&#39;s father is 7 years older than twice his age.&lt;br&gt;
{{{y = 2x+7}}}&lt;br&gt;
Substitute the value of y found in step (1) and solve to find Robert&#39;s age.&lt;br&gt;

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