Question

ex 9 va rog
doar a si b

Answer 1

b)

b)2x + 10° = 85° - x

b)2x + 10° = 85° - x2x + x = 85° - 10°

b)2x + 10° = 85° - x2x + x = 85° - 10°3x = 75°

b)2x + 10° = 85° - x2x + x = 85° - 10°3x = 75°x = 25°

b)2x + 10° = 85° - x2x + x = 85° - 10°3x = 75°x = 25°__________

a)

a)3x - 20° = 2x + 20°

a)3x - 20° = 2x + 20°3x-2x = 20° + 20°

a)3x - 20° = 2x + 20°3x-2x = 20° + 20°x = 40°

Sper ca te am ajutat succes in continuare!

Answer 2

Răspuns:

Explicație pas cu pas:

a) 3x-20°=2x+20°    alterne extrene

3x-2x=20°+20°   ⇒x=40°

b) 2x+10°=85°-x      corespondente

2x+x=85°-10°   ⇒3x=75°   ⇒x=25°