a: \(\Leftrightarrow x^2-10x+18-x^2=12\)
=>-10x=-6
hay x=3/5
b: \(\Leftrightarrow4x^2+3x-4x^2+8x=10\)
=>11x=10
hay x=10/11
c: \(\Leftrightarrow5x^2-15x+5+x-5x^2=x-2\)
=>-14x+5=x-2
=>-15x=-7
hay x=7/15
f: \(\Leftrightarrow4x^2-2x+3-4x^2+20x=7x-3\)
=>18x+3=7x-3
=>11x=-6
hay x=-6/11
\(a,\Leftrightarrow x^2-10x+18-x^2=12\)
\(\Leftrightarrow-10x=-6\)
\(\Leftrightarrow x=\dfrac{3}{5}\)
\(b,3x\left(\dfrac{4x}{3}+1\right)-4x\left(x-2\right)=10\)
\(\Leftrightarrow4x^2+3x-4x^2+8x=10\)
\(\Leftrightarrow11x=10\)
\(\Leftrightarrow x=\dfrac{10}{11}\)
\(c,5\left(x^2-3x+1\right)+x\left(1-5x\right)=x-2\)
\(\Leftrightarrow5x^2-15x+5+x-5x^2=x-2\)
\(\Leftrightarrow-15x=-7\)
\(\Leftrightarrow x=\dfrac{7}{15}\)
