Question 1096912
<br>You might have been taught that the first thing you do in an equation like this is distribute the 7 to the terms in the parentheses:
{{{7(9+k) = 84}}}
{{{63+7k = 84}}}
...<br>
But it is far easier (you will keep the numbers smaller) if you first divide both sides of the equation by 7:
{{{7(9+k) = 84}}}
{{{9+k = 12}}}<br>
It should be easy to finish from there.