麻煩幫幫忙,中1 Math

麻煩幫幫忙,from 1 Math
最好俾埋步驟,唔該!

10-2x+5x-2y

20-3x-30-y+4y

-3x+4y+5x-2y

2x(x要2次方)-2x-x(2次方)+5x

5-x-x(2次方)+2-3x

2x+3x-4x

5(2x)(3x)(2y)

5x(3x)+5x+3x

x+2x+4x

9-3p+7p-4

4x-2y-6x+9y

21y-40x+12x-9y

你搵d咩啊- -

10-2x+5x-2y
=3x-2y+10

10-2x+5x-2y
=10+3x-2y

20-3x-30-y+4y
=20-30+4y-y-3x
=-10+3y-3x

-3x+4y+5x-2y
=-3x+5x+4y-2y
=2x+2y

2x+3x-4x
=5x-4x
=x

5(2x)(3x)(2y)
=5乘2乘3乘2乘x(2次方)乘y
=60x(x要2次方)y

x+2x+4x
=3x+4x
=7x

9-3p+7p-4
=9-4-3p+7p
=5+4p

4x-2y-6x+9y
=4x-6x+9y-2y
=-2x+7y


21y-40x+12x-9y
=21y-9y+12x-40x
=12y-28x

自己計左..應該岩..吾岩吾好打我-.-
有d冇計..因為吾識xd-.-

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