Sagot :
Réponse :
Explications étape par étape :
2 - 4a = -2
a = -2/4 = -0.5
6y = -54
y = -54/6 = -9
-3x = -12
x = -12/-3 = 4
y/2 = 25
y = 25*2 = 50
4a/3 = -8
a = -8 / 4/3
= -8 * 3/4
= -24 / 4
a = -6
3 - -3 -2a = 7
-2a = 7 + 3 = 10
a = 10/-2
a = -5
3x/7 + 4 = -2
3x/7 = -2-4 = -6
x = -6 / 3/7
x = -6*7/3
x = 42/3
x = 14
7x - 10 = x
7x -x = 10
6x = 10
x = 10/6
x = 1.6
3b -9 = -5b + 7
3b + 5b = 7 + 9
8b = 16
b = 16/8 = 2
-y-4 = 3y +8
-y -3y = 8+4
-4y = 12
y = 12/-4
y = -3
-12x +4 = 5x -11
-12x -5x = -11 -4
-17x = -15
x = -15/-17
x = 0.8