Question

Prosze o pomoc
równanie

3x-4=2y-5
3y-9=x+3


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

HELP PROSZE O POMOC !!!!!!!!!!!!!!

Answer 1

Pierwsze:
3x - 4 = 2y - 5 / + 4
3y - 9 = x + 3 / + 9

3x = 2y - 1
3y = x + 12 / - x

3x = 2y - 1
3y - x = 12 / - 3y

3x = 2y - 1 / × 3
-x = 12 - 3y / × 2

9x = 6y - 3
-2x = 24 - 6y

7x = 21
x = 3

27 = 6y - 3 / + 3
30 = 6y / ÷ 6
y = 5

Drugie:
x = y + 1
2x = 5x - 4y / - 5x

x = y + 1 / × 4
-3x = -4y

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

x = 4
16 = 4y + 4 / - 4
12 = 4y / ÷ 4
y = 3