the answer should be 210 dollars because first of all remember that when we are dealing with this problems of percents we need to divide first the percent which is 50% by 100 and you will get 0.50 so then you multiplied it.
The answer is 12. Steps If that number is x (3+x)/(8+x)=3/4 "Cross multply" 4(3+x)=3(8+x) 12+4x=24+3x x=12 To check: add 12 to 3 and 8. 3+12=15 and 8+12=20. 15/20=3/4
