50
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Any of them. To get 50 to 30 you could... subtract 20 add -20 divide by 5/3 multiply by 3/5
2X + 50 = 5X - 10 subtract 2X from each side 50 = 3X - 10 add 10 to each side 60 = 3X divide each side by 3 20 = X check 2(20) + 50 = 5(20) - 10 40 + 50 = 100 - 10 90 = 90 checks
Divide the 20 over 50 by 10
3n+20=170 subtract 20 3n=150 divide by 3 n=50
To determine how many 50 cent pieces go into 10 dollars, you need to divide 10 by 0.50. This calculation shows that there are 20 fifty cent pieces in 10 dollars. This can also be expressed as 10 ÷ 0.50 = 20.