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truong han

19/07/2018 at 02:11
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simple expresson:

a,  \(x+22+\left(-14\right)+52\)

b,  \(\left(-90\right)+\left(p+10\right)+100\)




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    jimin bts cute 19/07/2018 at 02:18

    \(a,\)\(x+22+\left(-14\right)+52\)

       \(=x+\left(22+52\right)+\left(-14\right)\) 

       \(=x+74+\left(-14\right)\)

       \(=x+60\)

    \(b,\)  \(\left(-90\right)+\left(p+10\right)+100\)

          \(=\left(-90\right)-p-10+100\)

          \(=\left[\left(-90\right)+\left(-10\right)\right]+100+p\)

          \(=\left(-100\right)+100+p\)

          \(=0+p\)

          \(=p\)

    study well ^_^


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