Question

ayuda porfavor
porfavor ayuda​

Answer 1

Respuesta:

yo te ayudo :3

Explicación paso a paso:

I) A = x + 15

B = 5x + 45

X + 15 + 5x + 45 = 180

X + 5x = 180 - 60

6x = 120

X = 120 ÷ 6

X = 20

A = 20 + 15 = 35

B = 5(20) + 45 = 100 + 45 = 145

II) A = 5x - 20

B = 7x + 80

5x - 20 + 7x + 80 = 180

5x + 7x = 180 - 60

12x = 120

X = 120 ÷ 12

X = 10

A = 5(10) - 20 = 50 - 20 = 30

B = 7(10) + 80 = 70 + 80 = 150

III) A = -2x + 90

B = 8x - 30

-2x + 90 + 8x - 30 = 180

-2x + 8x = 180 - 60

6x = 120

X = 120 ÷ 6

X = 20