Answer:
a
Step-by-step explanation:
- 5(x-5) =5x-25
- expand 5x-25=5x-25
- therefore both sides are equal and has a real solution
Answer:
если это 11 класс то я не пон шо написано
Answer:
Step-by-step explanation:
a) ∠ABD + ∠DBC = 90°
4x - 3 + 7x - 6 = 90
4x + 7x - 3 - 6 = 90
11x - 9 = 90
11x = 90 + 9
11x = 99
x = 99/11
x = 9
∠ABD = 4*9 - 3 = 36 - 3 = 33