Et voilà le 2 eme exercice

a.x + 6 = 8. f.x -5.3 =-3.2
1x + 6 - 6 = 8-6. 1x - 5.3 + 5.3 =-3.2 + 5.3
1x = 2. 1x = 2.1
a =2. f= 2.1

b.t - 7 = 3. g.y + 15.7 = -30
1t - 7 + 7 = 3+7. 1y + 15.7 - 15.7 = - 30 - 15.7
1t =10. 1y = -14.3
b=10. g = -14.4

c. y + 11 = 10. h. -5.4 + t = 4.85
1y + 11-11 = 10-11. -5.4 + 1t + 5.4 = 4.85 + 5.4
1y = -1. 1t = 10.25
c=-1

d.1+ x = -2. i. x + 7 = - 1.2
1 + 1x - 1 = -2-1. 1x + 7 - 7 = - 1.2 -7
1x = -3. 1x = 8.2
d= -3. i = 8.2

e.t-5 = -3. j. y - 59.7 = - 100
1t - 5 + 5 = -3 +5. 1y - 59.7 + 59.7 = -100 + 59.7
1t = 2. 1y = 60.7
j = 60.7

j'espère que je t'ai aidé