comooon it's very easy !!
x - 3 = 2x + 5
x - 2x = 5 + 3
-x = 8
X = -8
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x3 + 2x2 - 8x + 5 = 0 x(2x - 8) + 5 = 0
If your question was 2X + 5 =10. X equals what? Then X=2.5
2x-11
-3x + (-18) = 2x + 7 +18 +18 -3x = 2x +25 -2x -2x -5x = 25 ----- ----- -5 -5 x=-5 *------- equals a division line
x equals 4