Question

tìm x thuộc Z 

( x - 3). ( 6 - x )

-2 (x-1) + (-6) = 10

-20 : 5 - 2x - 3 (-2) = 12

ko cần làm hết đâu nha 

ai nhanh mk k cho 3 cái cần gấp lắm

Answer 1

\(-2\left(x-1\right)+\left(-6\right)=10\)

\(-2\left(x-1\right)=10-\left(-6\right)\)

\(-2\left(x-1\right)=16\)

\(x-1=16:\left(-2\right)\)

\(x-1=-8\)

\(x=-8+1\)

\(x=-7\)

Answer 2

\(-2\left(x-1\right)+\left(-6\right)=10\)

\(-2.\left(x-1\right)=10-\left(-6\right)\)

\(-2\left(x-1\right)=16\)

\(x-1=16:\left(-2\right)\)

\(x-1=-8\)

\(x=\left(-8\right)+1\)

\(x=-7\)