Toán Lớp 6: a)3².22-3³.19
b)12(x-1):3=4³+2³
Giúp mình với????????????????
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Toán Lớp 6: a)3².22-3³.19
b)12(x-1):3=4³+2³
Giúp mình với????????????????
Comments ( 2 )
=9.22-27.19
=198-513
=198+(-513)
=-315
b)12(x-1):3=4^³+2^³
12(x-1):3=64+8
12(x-1):3=72
12(x-1)=72.2
12(x-1)=144
x-1=144:12
x-1=12
x=12+1
x=13