Question

2w-z=3
z=7-3w
9-a=3b
a-2b=-1​

Answer 1

Respuesta:

1. w = 2   z = 1

2. a = 3    b = 2

Explicación paso a paso:

1. 2w-z=3

 z =7-3w   3w + z = 7

2w - z = 3

3w + z = 7

5w = 10     w = 2      z = 1

2. 9-a=3b   -a - 3b = -9

   a-2b=-1​

-a - 3b = -9

a - 2b = -1

-5b = -10   b = 2    a = 3

RPTA:

1. w = 2   z = 1

2. a = 3    b = 2