Question

9x-3y =15
4x + 2y = 12​

Answer 1

Explicación paso a paso:

$9x - 3y = 15 \\ 4x + 2y = 12 \\ 9x - 3y = 15(2) \\ 4x + 2y = 12(3) \\ 18x - 6y = 30 \\ 12x + 6y = 36 \\ 30x = 66 \\ x = \frac{66}{30} = \frac{11}{5} \\ 4x - 2( \frac{11}{5} ) = 12 \\ 4x - \frac{22}{5} = 12 \\ 20x - 22 = 60 \\ 20x = 60 + 22 \\ 20x = 82 \\ x = \frac{82}{20} \\ x = \frac{41}{10}$