2÷X二1解方程 解方程.75%X+24=57 &nb.
解方程.75%X+24=57 &nb.
解方程.75%X+24=57 &nb.
(1)75%X+24=57,
0.75X+24-24=57-24,
0.75X÷0.75=33÷0.75,
X=44;
(2)
4 5X-
2 3=
1 6,
4 5X-
2 3+
2 3=

1 6
+
2 3,
4 5X×
5 4=
5 6×
5 4,
X=1
.
解方程.75%X+24=57 4 5 X- 2 3 = 1 6
(1)75%X+24=57,0.75X+24-24=57-24,
0.75X÷0.75=33÷0.75,
X=44;(2) 4 5
X-
2 3=
1 6,
4 5X-
2 3+
2 3=
1 6+
2 3,
4 5X×
5 4=
5 6×
5 4,
X=1
.
(1-75%x)=1/5(x+24)解方程
(1-75%x)=1/5(x+24)
解:(1-0.75x)=0.2(x+24)
0.25x=0.2x+0.48
0.25x-0.2x=0.48
0.05x=0.48
x=0.48/0.05
x=9.6
解方程.75x+x=10 3x-37=47 &nb.
(1)75x+x=10
76x=10
76x÷76=10÷76
x=
;
(2)3x-
3 7=
4 73x-
3 7+
3 7=
4 7+
3 73x=1
3x÷3=1÷3
x=
;
(3)5x÷15=4.5
1 3x=4.5
1 3x÷
1 3=4.5÷
1 3x=13.5;
(4)5x-12=18
5x-12+12=18+12
5x=30
5x÷5=30÷5
x=6.
X+24=59解方程
x+24=59
x=59-24
x=35
解方程.4x÷24=38 (x-3.5)×8=26.4 &nb.
(1)4x÷24=38
4x÷24×24=38×24
4x=912
4x÷4=912÷4
x=228;
(2)(x-3.5)×8=26.4
8x-28=26.4
8x-28+28=26.4+28
8x=54.4
8x÷8=54.4÷8
x=6.8;
(3)12.4y-3.6y=52.8
8.8y=52.8
8.8y÷8.8=52.8÷8.8
y=6.
解方程3.5X-X=3.25 &nb.
(1)3.5X-X=3.25,
(3.5-1)X=3.25,
2.5X=3.25,
2.5X÷2.5=3.25÷2.5,
X=1.3;
(2)8X-5×14=9.12,
8X-60=9.12,
8X-60+60=9.12+60,
8X=69.12,
8X÷8=69.12÷8,
X=8.64;
(3)3.3×2.6-5X=2.3×2.6,
8.58-5X=5.98,
8.58-5X+5X=5.98+5X,
5.98+5X=8.58,
5.98+5X-5.98=8.58-5.98,
5X=2.6,
5X÷5=2.6÷5,
X=0.52.
解方程:x?12=x+24?1
去分母得:2(x-1)=x+2-4,
去括号得:2x-2=x+2-4,
解得:x=0.
解方程.x+35%x=540 &nb.
(1)x+35%x=540
1.35x=540
1.35x÷1.35=540÷1.35
x=400
(2)
1 3+
1 4x=
4 9 1 3+
1 4x-
1 3=
4 9-
1 3 1 4x=
1 9 1 4x×4=
1 9×4
x=
(3)5x-
5 6=
5 125x-
5 6+
5 6=
5 12+
5 65x=
5 45x÷5=
5 4÷5
x=
(4)
2 3x=
7 12 2 3x×
3 2=
7 12×
3 2x=
解方程:x+24=x+13
x+2 4 = x+1 3,
3×(x+2)=4×(x+1),
3x+6-4=4x+4-4,
3x+2=4x,
3x+2-3x=4x-3x,
x=2.