Réponse :
5y - 10 = 3y + 4
5y - 3y = 4 + 10
2y = 14
y = 14 ÷ 2
y = 7
4h + 19 = -2h - 17
4h + 2h = -17 - 19
6h = -36
h = -36 ÷ 6
h = -6
-15b + 47 = 5b - 17
-15b - 5b = -17 - 47
-20b = -64
b = -64 ÷ -20
b = 3,2
5j + 30 = 2j - 6
5j - 2j = -6 - 30
3j = -36
j = -36 ÷ 3
j = -12
-5k - 4 = 3k - 8
-5k - 3k = -8 + 4
-8k = -4
k = -4 ÷ -8
k = 0,5
4g + 1 = 7g + 2
4g -7g = 2 - 1
-3g = 1
g = 1 ÷ -3
g ≈ -0,33
-x + 3 = x + 15
-x - x = 15 - 3
-2x = 12
x = 12 ÷ -2
x = -6
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Réponse :
5y - 10 = 3y + 4
5y - 3y = 4 + 10
2y = 14
y = 14 ÷ 2
y = 7
4h + 19 = -2h - 17
4h + 2h = -17 - 19
6h = -36
h = -36 ÷ 6
h = -6
-15b + 47 = 5b - 17
-15b - 5b = -17 - 47
-20b = -64
b = -64 ÷ -20
b = 3,2
5j + 30 = 2j - 6
5j - 2j = -6 - 30
3j = -36
j = -36 ÷ 3
j = -12
-5k - 4 = 3k - 8
-5k - 3k = -8 + 4
-8k = -4
k = -4 ÷ -8
k = 0,5
4g + 1 = 7g + 2
4g -7g = 2 - 1
-3g = 1
g = 1 ÷ -3
g ≈ -0,33
-x + 3 = x + 15
-x - x = 15 - 3
-2x = 12
x = 12 ÷ -2
x = -6
;)