Question

Układy równań:

x-3 y+5
---- - ---- = -1,5
4 2


x-3 2y-7
---- - ----- = 1
2 3


ROZWIĄŻCIE MI TO JAK NAJSZYBCIEJ . PROSZĘ:)

Answer 1

Zapis w [ ] to ułamek, a / to kreska ułamkowa

( [x – 3 / 4] – [y + 5 / 2] = -1,5 /*4
( [x – 3 / 2] – [2y – 7 / 3] = 1 /*6

( x – 3 – 2(y + 5) = - 6
( 3(x – 3) – 2(2y – 7) = 6

( x – 3 – 2y – 10 + 6 = 0
( 3x – 9 – 4y + 14 – 6 = 0

( x – 3 – 2y – 10 + 6 = 0
( 3x – 9 – 4y + 14 – 6 = 0

( x – 2y – 7 = 0 /*(-3)
( 3x – 4y – 1 = 0

( -3x + 6y + 21 = 0
( 3x – 4y – 1 = 0
_______________

2y + 20 = 0
2y = -20 /:2
y = -10

3x – 4y – 1 = 0
3x – 4 *(-10) -1 = 0
3x + 40 – 1 = 0
3x + 39 = 0
3x = -39 /:3
x = -13

( x = -13
( y = -10