814 - ( x - 305 ) : 16 = 48
( x - 305 ) : 16 = 814 - 48
( x - 305 ) : 16 = 766
( x - 305 ) = 12256
x - 305 = 12561
viết lại hết đi bạn + Thiên Thần Đáng Yêu !!!
a) \(\Rightarrow\left(x-305\right):16=814-48\)
\(\Rightarrow\left(x-305\right):16=766\Rightarrow x-305=766.16\Rightarrow x-305=12256\)
\(\Rightarrow x=12256+305\Rightarrow x=12561\)
b) \(\Rightarrow x-2=48\Rightarrow x=48+2\Rightarrow x=50\)
c) \(\Rightarrow3.\left(x-2\right)=60-51\Rightarrow3.\left(x-2\right)=9\Rightarrow x-2=9:3\Rightarrow x-2=3\)
\(\Rightarrow x=3+2\Rightarrow x=5\)
d) \(\Rightarrow12.x-33=243\Rightarrow12.x=243+33\Rightarrow12.x=276\Rightarrow x=276:12\Rightarrow x=23\)
