Question

cuanto es x + y = 3 4x + 4y = 12

Answer 1

Explicación paso a paso:

4x - y = 3

4x + 4y = 12

-y = 3 - 4x, y = 3+4x

4x + 4(por)(-3+4x) = 12

4x - 12 + 16x = 12

4x + 16x = 12 + 12

20x = 24

x = 24/20 = 6/5

y = -3+4 (por) 6/5 = -3/1+ 24/5 = -15 + 24/5 = 9/5

SOLUCIONES x = 6/5; y = 9/5