Question

i se cumple que: (a + b; 3) = (9; 2a – b), entonces:

Answer 1

Respuesta:

$a + b = 9 ..........(1\\ 2a - b = 3........(2 \\ por \: suma \: y \: resta \\ a + b = 9 \\ 2a - b = 3 \\ 3a = 12 \\ a = \frac{12}{3} \\ a = 4 \\ \\ 2a + 2b = 18 \\ - 2a + b = - 3 \\ 3b = 15 \\ b = \frac{15}{3} \\ b = 5 \\ \\ comprobando \\ a + b = 9 \\ 4 + 5 = 9 \\ 9 = 9 \\ 2a - b = 3 \\ 2(4) - 5 = 3 \\ 8 - 5 = 3 \\ 3 = 3$