Question 26064
1.
80(5)+2x=10(x+5)
400+2x=10x+50
-8x=-350
x=43.75

Hence, about 43.75ml of sloution is needd.


2.80(500)-30x=50(500+x)
40000-30x=50x+25000
-80x=-15000
x=187.5
500-187.5 = 312.5


Hence, about 187.5mg of 30% is needed and about 312.5mg of 50% is needed.
Paul.