x = -1
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2x-3 = 21+10x 2x-10x = 21+3 -8x = 24 x = -3
10x. 'coz x=? so just add 2 & 8.
If your question was 2X + 5 =10. X equals what? Then X=2.5
2x + (10x - 4) = 20 2x + 10x - 4 = 20 12x - 4 = 20 12x = 24 x = 2
The solution is 1/2 or 0.5. This is how: 2x+1=7-10x 2x=6-10x 12x=6 x=1/2