Question

rezolva prin metoda substitutiei urmatorul sistem:y=3x-2 4x+2y=1 va rog cat mai repede

Answer 1

$\left\{\begin{matrix} y = 3x - 2\\ 4x + 2y = 1\end{matrix}\right.$

$4x + 2y = 1$

$4x + 2(3x - 2) = 1$

$4x + 6x - 4 = 1$

$4x + 6x = 1 + 4$

$10x = 5$

$x = \frac{5}{10}$

$x = \frac{1}{2}$

$y = 3x - 2$

$y = 3 \times \frac{1}{2} - 2$

$y = \frac{3}{2} - 2$

$y = \frac{3}{2} - \frac{4}{2}$

$y = - \frac{1}{2}$