2(x+3)-5(1-x)=3(3-1) 4-3(2-x)=5x 4x-3(20-x)=6x-7(9-x) 4-3(2-
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2(x+3)-5(1-x)=3(3-1) 4-3(2-x)=5x 4x-3(20-x)=6x-7(9-x) 4-3(2-x)=5x 4x-3(20-x)=6x-7(9-x)
1/3 - x-1/2 = 1
x+8/3=-x
1-m/2 - 3-3m/4=1
x-2/0.2 - x+1/0.5=3
2(x+3) - 5(1-x) = 3(x-1)
4-3(2-x)=5x
4x-3(20-x)=6x-7(9-x)
1/3 - x-1/2 = 1
x+8/3=-x
1-m/2 - 3-3m/4=1
x-2/0.2 - x+1/0.5=3
2(x+3) - 5(1-x) = 3(x-1)
4-3(2-x)=5x
4x-3(20-x)=6x-7(9-x)
(1) 1/3 - x-1/2 = 1
-x=-1/3+1/2+1
= -2/6 + 3/6 + 6/6
= 7/6
x=-7/6
(2) x+8/3=-x
x+x=-8/3
2x=-8/3
x=-4/3
(3) 1-m/2 - 3-3m/4=1
-m/2-3m/4 = -1+3+1
-3m/2 = 3
-3m=6
m=-2
(4) x-2/0.2 - x+1/0.5=3
5(x-2) - 2(x+1) = 3
5x-10 - 2x-2 = 3
3x = 10+2+3
x= 5
再问: 2(x+3) - 5(1-x) = 3(x-1) 4-3(2-x)=5x 4x-3(20-x)=6x-7(9-x) 还有这个呢,谢谢啊
再答: 2(x+3) - 5(1-x) = 3(x-1) 2x+6-5+5x = 3x-3 7x-3x = -1-3 4x=-4 x=-1 4-3(2-x)=5x 4-6+3x = 5x 3x-5x=6-4 -2x = 2 x=-1 4x-3(20-x)=6x-7(9-x) 4x-60+3x = 6x -63+7x 7x-60 = 13x-63 7x-13x = 60-63 -6x = -3 x=-0.5
-x=-1/3+1/2+1
= -2/6 + 3/6 + 6/6
= 7/6
x=-7/6
(2) x+8/3=-x
x+x=-8/3
2x=-8/3
x=-4/3
(3) 1-m/2 - 3-3m/4=1
-m/2-3m/4 = -1+3+1
-3m/2 = 3
-3m=6
m=-2
(4) x-2/0.2 - x+1/0.5=3
5(x-2) - 2(x+1) = 3
5x-10 - 2x-2 = 3
3x = 10+2+3
x= 5
再问: 2(x+3) - 5(1-x) = 3(x-1) 4-3(2-x)=5x 4x-3(20-x)=6x-7(9-x) 还有这个呢,谢谢啊
再答: 2(x+3) - 5(1-x) = 3(x-1) 2x+6-5+5x = 3x-3 7x-3x = -1-3 4x=-4 x=-1 4-3(2-x)=5x 4-6+3x = 5x 3x-5x=6-4 -2x = 2 x=-1 4x-3(20-x)=6x-7(9-x) 4x-60+3x = 6x -63+7x 7x-60 = 13x-63 7x-13x = 60-63 -6x = -3 x=-0.5
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