Question

Answer 1

a: \(\Leftrightarrow3\left(x-3\right)=90-5\left(1-2x\right)\)

\(\Leftrightarrow3x-9-90+5-10x=0\)

=>-7x=94

hay x=-94/7

b: \(\Leftrightarrow2\left(3x-2\right)-60=3\left(3-2x-14\right)\)

\(\Leftrightarrow6x-4-60=3\left(-2x-11\right)\)

=>6x-64=-6x-33

=>12x=31

hay x=31/12

c: \(\Leftrightarrow2x+\dfrac{6}{5}=5-\dfrac{13}{5}-x\)

\(\Leftrightarrow3x=\dfrac{12}{5}-\dfrac{6}{5}=\dfrac{6}{5}\)

hay x=2/5