Question

3x+2y=7
4×-3y=-2
método de igualación

x+3y=5
2x+y/2=1
método de igualación ​

Answer 1

Explicación paso a paso:

$3x + 2y = 7 \\ 3x = 7 - 2y \\ x = \frac{7 - 2y}{3} \\ 4x - 3y = - 2 \\ 4x = 3y - 2 \\ x = \frac{3y - 2}{4} \\ x = x \\ \frac{7 - 2y}{3} = \frac{3y - 2}{4} \\ 4(7 - 2y) = 3(3y - 2) \\ 28 - 8y = 9y - 6 \\ 28 + 6 = 8y + 9y \\ 34 = 17y \\ \frac{34}{17} = y \\ 2 = y \\ x = \frac{7 - 2(2)}{3} \\ x = \frac{7 - 4}{3} \\ x = \frac{3}{3} \\ x = 1$