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
thirty plus 50 equals 80 it is quite simple. all you do is you just add 3 and 5 then add on the zero.