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解：去括号，得2 + 2x + 8 = 2x - 10 + 5x
合并同类项，得2x + 10 = 7x - 10
移项，得2x - 7x = -10 - 10
合并同类项，得-5x = -20
系数化为1，得x = 4
解：移项，得4(x + 1) - 3(x + 1) = 2(x - 1) + 2(x - 1)
合并同类项，得(x + 1) = 4(x - 1)
去括号，得x + 1 = 4x - 4
移项，得x - 4x = -4 - 1
合并同类项，得-3x = -5
系数化为1，得x = 5/3
解：去括号，得x + 2 = 2x + 2
移项，得x - 2x = 2 - 2
合并同类项，得-x = 0
系数化为1，得x = 0
解：去括号，得11 - 2y + 2 = 3 + 8y - 12
合并同类项，得13 - 2y = 8y - 9
移项，得-2y - 8y = -9 - 13
合并同类项，得-10y = -22
系数化为1，得y = 11/5
解：去括号，得6x - 6 + 5x - 5 = 11
合并同类项，得11x - 11 = 11
移项，得11x = 11 + 11
合并同类项，得11x = 22
系数化为1，得x = 2
解：合并同类项，得(3 + 4 - 5)(t - 2) = 10
即2(t - 2) = 10
去括号，得2t - 4 = 10
移项，得2t = 10 + 4
合并同类项，得2t = 14
系数化为1，得t = 7
(1) 解：根据题意，得-6☆2 = (-6)×2 - 3×2 = -12 - 6 = -18

(2) 解：根据题意，得-3☆(x + 1) = -3(x + 1) - 3(x + 1) = -6(x + 1)
x☆(-2) = x×(-2) - 3×(-2) = -2x + 6
所以-6(x + 1) = -2x + 6
去括号，得-6x - 6 = -2x + 6
移项，得-6x + 2x = 6 + 6
合并同类项，得-4x = 12
系数化为1，得x = -3
-34

(2)解:原方程可化为6x+12−3(3x−1)=6, 整理,得−3x=−9,解得x=3.
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