紧急!利用等式的性质解方程.(1) -2(x-1)-4(x-2)=1 (2)12-(9-y)=5(y-4)-13(3) 0.8(2x-1)-(3-0.4x)=2 (4) 1-8(1/4+0.5x)=3(1-2x)(5)1/5(x+1)-1=1/3(x-2) (6) x/2- (x+1)/3=1(7) x-(x-1)/2=2 (8)x-(x-1)/2=2-(x+2)/3注意!例如1/2是二分之一的意思.
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![紧急!利用等式的性质解方程.(1) -2(x-1)-4(x-2)=1 (2)12-(9-y)=5(y-4)-13(3) 0.8(2x-1)-(3-0.4x)=2 (4) 1-8(1/4+0.5x)=3(1-2x)(5)1/5(x+1)-1=1/3(x-2) (6) x/2- (x+1)/3=1(7) x-(x-1)/2=2 (8)x-(x-1)/2=2-(x+2)/3注意!例如1/2是二分之一的意思.](/uploads/image/z/3779801-17-1.jpg?t=%E7%B4%A7%E6%80%A5%21%E5%88%A9%E7%94%A8%E7%AD%89%E5%BC%8F%E7%9A%84%E6%80%A7%E8%B4%A8%E8%A7%A3%E6%96%B9%E7%A8%8B.%281%29+-2%28x-1%29-4%28x-2%29%3D1+%282%2912-%289-y%29%3D5%28y-4%29-13%283%29+0.8%282x-1%29-%283-0.4x%29%3D2+%284%29+1-8%281%2F4%2B0.5x%29%3D3%281-2x%29%285%291%2F5%28x%2B1%29-1%3D1%2F3%28x-2%29+%286%29+x%2F2-+%28x%2B1%29%2F3%3D1%287%29+x-%28x-1%29%2F2%3D2+%288%29x-%28x-1%29%2F2%3D2-%28x%2B2%29%2F3%E6%B3%A8%E6%84%8F%21%E4%BE%8B%E5%A6%821%2F2%E6%98%AF%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80%E7%9A%84%E6%84%8F%E6%80%9D.)
紧急!利用等式的性质解方程.(1) -2(x-1)-4(x-2)=1 (2)12-(9-y)=5(y-4)-13(3) 0.8(2x-1)-(3-0.4x)=2 (4) 1-8(1/4+0.5x)=3(1-2x)(5)1/5(x+1)-1=1/3(x-2) (6) x/2- (x+1)/3=1(7) x-(x-1)/2=2 (8)x-(x-1)/2=2-(x+2)/3注意!例如1/2是二分之一的意思.
紧急!利用等式的性质解方程.(1) -2(x-1)-4(x-2)=1 (2)12-(9-y)=5(y-4)-13
(3) 0.8(2x-1)-(3-0.4x)=2 (4) 1-8(1/4+0.5x)=3(1-2x)
(5)1/5(x+1)-1=1/3(x-2) (6) x/2- (x+1)/3=1
(7) x-(x-1)/2=2 (8)x-(x-1)/2=2-(x+2)/3
注意!例如1/2是二分之一的意思.
紧急!利用等式的性质解方程.(1) -2(x-1)-4(x-2)=1 (2)12-(9-y)=5(y-4)-13(3) 0.8(2x-1)-(3-0.4x)=2 (4) 1-8(1/4+0.5x)=3(1-2x)(5)1/5(x+1)-1=1/3(x-2) (6) x/2- (x+1)/3=1(7) x-(x-1)/2=2 (8)x-(x-1)/2=2-(x+2)/3注意!例如1/2是二分之一的意思.
(1) -2(x-1)-4(x-2)=1
-2x+2-4x+8=1
-6x=-9
x=3/2
(2)12-(9-y)=5(y-4)-13
12-9+y=5y-20-13
y-5y=-33-3
-4y=-36
y=9
(3) 0.8(2x-1)-(3-0.4x)=2
1.6x-0.8-3+0.4x=2
2x=5.8
x=2.9
(4) 1-8(1/4+0.5x)=3(1-2x)
1-2-4x=3-6x
-4x+6x=3+1
2x=4
x=2
(5)1/5(x+1)-1=1/3(x-2)
3x+3=5x-10
3x-5x=-10-3
-2x=-13
x=6.5
(6) x/2- (x+1)/3=1
3x-2x-2=6
x=8
(7) x-(x-1)/2=2
2x-x+1=4
x=3
(8)x-(x-1)/2=2-(x+2)/3
6x-3x+3=12-2x-4
3x+2x=8-3
5x=5
x=1
傻吊 成出来 然后加加减减就行了,字都会打这都懒得算 ,这么懒可不行
(3) 1.6x-0.8-3+0.4x=2
2x-3.8=2
2x=5.8
x=2.9
4 1-2-4x=3-6x
2x=3+2-1
x=2
哥 你太懒啦~