Question

tìm x , biết:

-115-(17+2x)=20

Answer 1

-115-(17+2x)=20

=>\(2x+17=-115-20=-135\)

=>\(2x=-135-17=-152\)

=>\(x=-\dfrac{152}{2}=-76\)

Answer 2

\(-115-\left(17+2x\right)=20\)

\(=>17+2x=\left(-115\right)-20\)

\(=>17+2x=-135\)

\(=>2x=\left(-135\right)-17\)

\(=>2x=-152\)

\(=>x=\left(-152\right):2\)

\(=>x=-76\)