Question

7x+8y=29 5x+11y=26 método cramer

Answer 1

7x + 8y = 29
5x + 11y = 26

Determinante

| 7 8 |
| 5 11|
= (7)(11) - (5)(8)
= 37

| 29 8 |
| 26 11 |
= (29)(11) - (26)(8)
= 111

| 7 29 |
| 5 26 |
= (7)(26) - (5)(29)
= 37

Por tanto

x = 111 / 37
x = 3

y = 37/37
y = 1

Answer 2

Respuesta:

7x + 8y =29

5x - 11y =26

3x - 4y =16

8x - 5y =-5