Question 1189924
v of the 85%
180-v of the 55%


{{{highlight_green(85v+55(180-v)=75*180)}}}


{{{85v-55v+55*180=75*180}}}

{{{(85-55)v=75*180-55*180}}}

{{{highlight_green(v=180((75-55)/(85-55)))}}}----------simplify or reduce this.


{{{v=180(20/30)}}}

{{{v=180(2/3)}}}----------this is mostly simplified.

{{{highlight(v=120)}}}-------amount of the 85% antifreeze to use.