有8絛數學唔識做
1.x-18=-5
2.y-26=-26
3..x-5=-9
4.x-15=-31
5.x-23=-19
6.3x+2=11
7.4x+5=13
8.6y+12=20
(要有過程和答案)
回答 (6)
✔ 最佳答案
1.x-18=-5
x-18+18=-5+18
x = 13
2.y-26=-26
y-26+26 = -26 +26
y = 0
3..x-5=-9
x-5+5= -9+5
x = -4
4.x-15=-31
x-15+15 = -31 +15
x = -16
5.x-23=-19
x-23+23= -19+23
x = 4
6.3x+2=11
3x+2-2= 11-2
3x = 9
3x/3=9/3
x=3
7.4x+5=13
4x +5-5= 13-5
4x = 8
4x/4 = 8/4
x = 2
8.6y+12=20
6y+12-12 = 20 - 12
6y =8
6y/6 = 8/6
y = 4/3
參考: myself
1. x-18=-5
x=-5+18
x=13
2. y-26=-26
y=-26+26
y=0
3. x-5=-9
X=-9+5
X=-4
4. x-15=-31
X=-31+15
X=-16
5. x-23=-19
X=-19+23
X=4
6. 3x+2=11
3X=11-2
X=9/3
X=3
7. 4x+5=13
4X=13-5
X=8/4
X=2
8. 6y+12=20
6y=20-12
y=8/6
y=4/3
參考: 自己
1. x-18= -5
x=-5+18
x=13
2. y-26=-26
y=-26+26
y=0
3 x-5=-9
x=-9+5
x=-4
4. x-15=-31
x=-31+15
x=-16
5. x-23=-19
x=-19+23
x=4
6. 3x+2=11
3x=11-2
3x=9
x=3
7. 4x+5=13
4x=13-5
4x=8
x=2
8. 6y+12=20
6y=20-12
6y=8
y=8/6
y=1 1/3
1.x-18=-5
x-18+18=-5+18
x=13
2.y-26=-26
y-26+26=-26+26
y=0
3..x-5=-9
x-5+5=-9+5
x=-4
4.x-15=-31
x-15+15=-31+15
x=-16
5.x-23=-19
x-23+23=-19+23
x=4
6.3x+2=11
3x+2-2=11-2
3x=9
3x/3=9/3
x=3
7.4x+5=13
4x+5-5=13-5
4x=8
4x/4=8/4
x=2
8.6y+12=20
6y+12-12=20-12
6y=8
6y/6=8/6
y=1 1/3
1.x-18=-5
x=-5+18
x=13
2.y-26=-26
y=0
3..x-5=-9
x=-9+5
x=4
4.x-15=-31
x=-31+15
x=-16
5.x-23=-19
x=-19+23
x=4
6.3x+2=11
3x=11-2
x=9/3
x=3
7.4x+5=13
4x=13-5
x=8/4
x=2
8.6y+12=20
6y=20-12
y=8/6
y=4/3
1) x-18=-5
x = -5+18
x = 13
2) y-26=-26
y = -26+26
y = 0
3) x-5=-9
x =-9+5
x = -4
4) x-15=-31
x = -31+15
x = -16
5) x-23=-19
x = -19+23
x = 4
6) 3x+2=11
3x = 11-2
3x = 9
x = 3
7) 4x+5=13
4x = 13-5
4x = 8
x = 2
8) 6y+12=20
6y = 20-12
6y = 8
y = 1.3333(4 d.p.)
收錄日期: 2021-04-12 17:47:53
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