Question

Answer 1

\(a,4x+5=1\)

\(\Leftrightarrow4x=-4\)

\(\Leftrightarrow x=-1\)

Vậy : S = {-1}

\(b,-5x+2=14\)

\(\Leftrightarrow-5x=12\)

\(\Leftrightarrow x=-\dfrac{12}{5}\)

Vậy : S = \(\left\{-\dfrac{12}{5}\right\}\)

\(c,6x-3=8x+9\)

\(\Leftrightarrow-2x=12\)

\(\Leftrightarrow x=-6\)

Vậy : S = {-6}

\(d,7x-5=13-5x\)

\(\Leftrightarrow12x=18\)

\(\Leftrightarrow x=\dfrac{3}{2}\)

Vậy : S = \(\left\{\dfrac{3}{2}\right\}\)

\(e,2-3x=5x+10\)

\(\Leftrightarrow-8x=8\)

\(\Leftrightarrow x=-1\)

Vậy : S = {-1}

\(f,13-7x=4x-20\)

\(\Leftrightarrow-11x=-33\)

\(\Leftrightarrow x=3\)

Vậy : S = {3}