Bjr ou bsr je voudrais que vous m'aidiez pour un devoir en math. Exercice1: Résoudre les équations suivantes. 2×-3=4+× Y+4=-4-3y 7×-6=4-3× 12-a=18-3a -t-4=8+7t

bjr

2x - 3 = 4 + x

2x - x = 4 + 3

x = 7

y + 4 = - 4 - 3y

y + 3y = -4 - 4

4y = -8

y = -2

7x - 6 = 4 - 3x

7x + 3x = 4 + 6

10x = 10

x = 1

12 - a = 18 - 3a

-a + 3a = 18 - 12

2a = 6

a = 3

-t - 4 = 8 + 7t

-t - 7t = 8 + 4

-8t = 12

t = -3/2

13x + 11 = 8x + 28

13x - 8x = 28 - 11

5x = 17

x = 17/5

7y + 22 = 14 - 4y

7y + 4y = 14 -22

11y = -8

y = -8/11

x + 4 = -12

x = -12 - 4

x = -16

5x = 45

x = 45/5 = 9