Question

3(x + y - 2) = (2х - у + 3 ) +1
2 (2x-3y+1)= 3 (3х – 4y +5) +4​

Answer 1

Răspuns:

Explicație pas cu pas:

3(x + y - 2 ) = ( 2x - y + 3) +1

3x + 3y + 3 × (-2) = 2x - y + 3 + 1

3x +3y -6 = 2x - y + 4

3x + 3y - 6 - 2x = - y + 4

x + 3y - 6 = -y +4

x - 6 = -y +4 - 3y +6

x = -y +4 -3y +6

x = - 4y +4 +6

x = -4y +10

2(2x-3y+1) = 3(3x-4y+5) +4

2(2x) + 2(-3y) +2×1 = 3 ( 3x -4y+5) +4

4x - 6y + 2 = 9x - 12y + 15 + 4

4x -6y + 2 = 9x - 12y +19

4x - 6y +2 - 9x = -12y + 19

- 5x + 2 = -12y + 19 + 6y

-5x = - 12y + 19 + 6y - 2

-5x = -6y + 19 - 2

-5x = -6y + 17

Divide fiecare cu -5

-5x / -5 = -6y/-5 + 17/-5

x = -6 y / -5 + 17 / -5

x = 6y / 5 - 17 / 5