Question

3x×(12x−4)−9x×(4x−3)=30     giúp mik vs

Answer 1

\(3x\left(12x-4\right)-9x\left(4x-3\right)=30\)

\(\Leftrightarrow36x^2-12x-36x^2+27x=30\)

\(\Leftrightarrow15x=30\)

\(\Leftrightarrow x=2\)

Vậy \(S=\left\{2\right\}\)

Answer 2

\(\Leftrightarrow\) 36x² - 12x - 36x² + 27x = 30

\(\Leftrightarrow\) 15x = 30

\(\Leftrightarrow\) x = 30 : 15 = 2

Answer 3

$3x\left(12x-4\right)-9x\left(4x-3\right)=30$

$\iff 36{}^{}-12x-36{}^{}+27x=30$

$\iff 15x=30$

$\iff x=2$

Vậy $S=\left\{2\right\}$

Answer 4

$\iff$ 36x² - 12x - 36x² + 27x = 30

$\iff$ 15x = 30

$\iff$ x = 30 : 15 = 2