Question 1188514
v of 80% and 7-v of 30%


{{{80v+30(7-v)=50*7}}}

-

{{{80v-30v+30*7=50*7}}}

{{{(80-30)v=50*7-30*7}}}

{{{v=7((50-30)/(80-30))}}}

{{{highlight(v=7(2/5))}}}---------you can continue and finish.