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標題:

有8絛數學唔識做

發問:

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)

最佳解答:

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

其他解答:

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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|||||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.)
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