Question 1133166
<pre>
TIME     WEIGHT
 0         315
35         y
90         270
</pre>

{{{(270-315)/(90-0)=(y-315)/(35-0)}}}

-

{{{-45/90=(y-315)/35}}}

{{{1/2=(315-y)/35}}}

{{{35/2=315-y}}}

{{{y=315-35/2}}}

{{{highlight_green(y=297&1/2)}}}