数学问题(一元一次方程)(今晚22:00之前有效)解下列方程:(1)18=5-x(2)3/4x+2=3-1/4x(3)3x-7+4x=6x-2(4)10y+5=11y-5-2y(5)a-1=5+2a(6)0.3x+1.2-2x=1.2-2.7x
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![数学问题(一元一次方程)(今晚22:00之前有效)解下列方程:(1)18=5-x(2)3/4x+2=3-1/4x(3)3x-7+4x=6x-2(4)10y+5=11y-5-2y(5)a-1=5+2a(6)0.3x+1.2-2x=1.2-2.7x](/uploads/image/z/2828254-22-4.jpg?t=%E6%95%B0%E5%AD%A6%E9%97%AE%E9%A2%98%EF%BC%88%E4%B8%80%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%EF%BC%89%EF%BC%88%E4%BB%8A%E6%99%9A22%EF%BC%9A00%E4%B9%8B%E5%89%8D%E6%9C%89%E6%95%88%EF%BC%89%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%EF%BC%9A%EF%BC%881%EF%BC%8918%EF%BC%9D5-x%EF%BC%882%EF%BC%893%2F4x%2B2%EF%BC%9D3-1%2F4x%EF%BC%883%EF%BC%893x-7%2B4x%EF%BC%9D6x-2%EF%BC%884%EF%BC%8910y%2B5%EF%BC%9D11y-5-2y%EF%BC%885%EF%BC%89a-1%EF%BC%9D5%2B2a%EF%BC%886%EF%BC%890.3x%2B1.2-2x%EF%BC%9D1.2-2.7x)
数学问题(一元一次方程)(今晚22:00之前有效)解下列方程:(1)18=5-x(2)3/4x+2=3-1/4x(3)3x-7+4x=6x-2(4)10y+5=11y-5-2y(5)a-1=5+2a(6)0.3x+1.2-2x=1.2-2.7x
数学问题(一元一次方程)(今晚22:00之前有效)
解下列方程:
(1)18=5-x
(2)3/4x+2=3-1/4x
(3)3x-7+4x=6x-2
(4)10y+5=11y-5-2y
(5)a-1=5+2a
(6)0.3x+1.2-2x=1.2-2.7x
数学问题(一元一次方程)(今晚22:00之前有效)解下列方程:(1)18=5-x(2)3/4x+2=3-1/4x(3)3x-7+4x=6x-2(4)10y+5=11y-5-2y(5)a-1=5+2a(6)0.3x+1.2-2x=1.2-2.7x
(1)18=5-x
x+18=5
x=-13
(2)3/4x+2=3-1/4x
3/4x+1/4x=3-2
x=1
(3)3x-7+4x=6x-2
3x-6x+4x=7-2
x=5
(4)10y+5=11y-5-2y
10y-11y+2y=-5-5
y=-10
(5)a-1=5+2a
a-2a=5+1
-a=6
a=-6
(6)0.3x+1.2-2x=1.2-2.7x
0.3x+2.7x=1.2-1.2
3x=0
x=0
1、x=-13
2、3x+8=12-x
x=1
3、x=5
4、y=-10
5、a=-6
6、x=0
1.x=-13
2.x=1
3.x=5
4.y=-10
5.a=-6
6.x=0
x=-13
x=1
x=5
y=-10
a=-6
x=o
1:x=-13
2:x=1
3: x=5
4: y=-10
5:a=-6
6:x=0
(1)x=5-18=-13;
(2)3+8x=12x-1;(12-8)x=3+1;4x=4;x=1;
(3)x=5(只要将含x的全移到等式一边,数值移到另一边);
(4)(10-11+2)y=-5-5;y=-10;
(5)(2-1)a=-1-5;a=-6;
(6)(0.3+2.7-2)x=1.2-1.2;x=0.
(1)18=5-x
x-5=18
x=18+5
x=23
(2)3/4x+2=3-1/4x
3/4x+1/4x=3-2
x=1
(3)3x-7+4x=6x-2
7x-6x=7-2
x=5
(4)10y+5=11y-5-2y
10y-9y=-5-5
y=-10
(5)a-1=5+2a
2a-a=-1-5
a=-6
(6)0.3x+1.2-2x=1.2-2.7x
0.3x-2x+2.7x=1.2-1.2
x=0