Question

tìm x

2(x-1) + 3 (x+3) = -8

Answer 1

2(x+1) +3(x+3)=-8

=>2x+2+3x+9 =-8

=>5x+11=-8

=>5x=-19

=>x=\(\dfrac{-19}{5}\)

Answer 2

Tìm x:

\(2\left(x-1\right)+3\left(x+3\right)=-8\)

\(\Leftrightarrow2x-2+3x+9=-8\)

\(\Leftrightarrow5x=-8+2-9\)

\(\Leftrightarrow5x=-15\)

\(\Leftrightarrow x=-3\)

Vậy \(x=-3\)

Answer 3

Ta có :

2(x-1) + 3(x+3) = -8

\(\Leftrightarrow\)2x-2 + 3x+9 = -8

\(\Leftrightarrow\) 5x + 7 = -8

\(\Leftrightarrow\) 5x = -15

\(\Leftrightarrow\) x = -3