Odpowiedź:
Ćwiczenie 2
I sposób
7 - (6 + x)/3 = 2(x - 1) + 7
7 - 2 + 1/3x = 2x - 2 + 7
5 + 1/3x = 2x + 5
1/3x - 2x = 5 - 5
(- 1 2/3)x = 0
x = 0
II sposób
7 - (6 + x)/3 = 2(x - 1) + 7 | * 3
7 * 3 - 6 - x = 3 * 2(x - 1) + 7 * 3
21 - 6 -x = 6(x - 1) + 21
15 - x = 6x - 6 + 21
15 - x = 6x + 15
- x - 6x = 15 - 15
- 7x = 0
Ćwiczenie 3
P = a² + 2ah
2ah = P - a²
h = (P - a²)/2a dla a ≠ 0
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Odpowiedź:
Ćwiczenie 2
I sposób
7 - (6 + x)/3 = 2(x - 1) + 7
7 - 2 + 1/3x = 2x - 2 + 7
5 + 1/3x = 2x + 5
1/3x - 2x = 5 - 5
(- 1 2/3)x = 0
x = 0
II sposób
7 - (6 + x)/3 = 2(x - 1) + 7 | * 3
7 * 3 - 6 - x = 3 * 2(x - 1) + 7 * 3
21 - 6 -x = 6(x - 1) + 21
15 - x = 6x - 6 + 21
15 - x = 6x + 15
- x - 6x = 15 - 15
- 7x = 0
x = 0
Ćwiczenie 3
P = a² + 2ah
2ah = P - a²
h = (P - a²)/2a dla a ≠ 0