Question

20x - 2 - 15x - 3 = 12(x - 4)​

Answer 1

Explicación paso a paso:

$20x - 2 - 15x - 3 = 12(x - 4) \\ 20x - 15x - 2 - 3 = 12x - 48 \\ 20x - 15x - 12x = - 48 + 2 + 3 \\ - 7x = - 43 \\ x = \frac{ - 43}{ - 7} \\ x = \frac{43}{7}$

comprobando

$20x - 2 - 15x - 3 = 12(x - 4) \\ 20( \frac{43}{7} ) - 2 - 15( \frac{43}{7} ) - 3 = 12( \frac{43}{7} - 4) \\ \frac{860}{7} - 2 - \frac{645}{7} - 3 = \frac{516}{7} - 48 \\ \frac{215}{7} - \frac{35}{7} = \frac{516}{7} - \frac{336}{7} \\ \frac{180}{7} = \frac{180}{7}$