Question

Resolva as equações seguintes:
A) 17P-20=5(5-20)

B) 7X-12=5X-12

C) 15X+16=5X+32

Answer 1

A⇒ 17p - 20 = 5( 5 - 20)

17p - 20 = 25 - 100

17p = 25 - 100 + 20

17p = -55

p = -55/17 ≅ -3,23

B⇒ 7x -12 = 5x - 12

7x = 5x -12 + 12

7x = 5x

7x - 5x = 2x

C⇒ 15x + 16 = 5x + 32

15x - 5x = 32 - 16

10x = 16

x = 16/10

x = 1,6