10
Here are all the numbers that when added equal 30: 1+29= 30 2+28=30 3+27=30 4+26=30 5+25=30 6+24=30 7+23=30 8+22=30 9+21=30 10+20=30 11+19=30 12+18=30 13+17=30 14+16=30 15+15=30 16+14=30 17+13=30 18+12=30 19+11=30
It is: -16+(-14) = -30
286
60 + 60 + 60 + 50 + 50 + 40 + 30 = 350
10
30
It is: 30
Here are all the numbers that when added equal 30: 1+29= 30 2+28=30 3+27=30 4+26=30 5+25=30 6+24=30 7+23=30 8+22=30 9+21=30 10+20=30 11+19=30 12+18=30 13+17=30 14+16=30 15+15=30 16+14=30 17+13=30 18+12=30 19+11=30
I am having difficulty understanding your question. 12 + 20 = 10 is obviously false (12 + 20 = 32).If 4x + 14 = 2x + 30, then x must equal 8.
-30 plus 60 = 30
30 + 80 = 110
half of 30 is 15, so 15 added to 15 would equal 30. if you go from there and add one number and subtract one number from each 15 (14 plus 16, 13 plus 17, ect...all the way to 0 plus 30) these numbers will also total to 30.
-30
-30
2+40+30=72
30 + 50 + 70 = 150