Question

Answer 1

\(a,5\left(x-3\right)+3=2x\)

\(\Leftrightarrow5x-15+3=2x\)

\(\Leftrightarrow5x-2x=15-3\)

\(\Leftrightarrow3x=12\)

\(\Leftrightarrow x=4\)

Answer 2

b: \(\Leftrightarrow6x-9=30-5x+5\)

=>11x=35+9=44

hay x=4

c: \(\Leftrightarrow\left(2x-3\right)^2+\left(2x-3\right)\left(x+5\right)=0\)

=>(2x-3)(2x-3+x+5)=0

=>(2x-3)(3x+2)=0

=>x=3/2 hoặc x=-2/3

d: \(\Leftrightarrow x^2+2x-x+2=2\)

\(\Leftrightarrow x\left(x+1\right)=0\)

hay x=-1