Question

si a = b = c y 2a - c = 40, hallar: a + b + c 5 7 9

Answer 1

Explicación paso a paso:

si a = b = c

2a - c = 40

2c - c = 40

Entonces:

a = 40

b = 40

c = 40

hallar: 5a + 7b + 9c

= 5a + 7b + 9c

= 5(40) + 7(40) + 9(40)

= 200 + 280 + 360

= 840

Rpta.: 840