Bonjour, pourriez vous m'aidez pour mes deux exercices de mathématique s'il vous plaît ? (43 a/b et 44 a/b)
Merci beaucoup !
Merci beaucoup !
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43) a)5x + 7 = 2x - 2
5x - 2x = -2 - 7
3x = -9
x = (-9) / 3
x = (-3)
b)
3x + 2 = x - 10
3x - x = -10 - 2
2x = -12
x = (-12) / 2
x = (-6)
44) a)
2x - 5 = 5x + 1
-5 - 1 = 5x - 2x
-6 = 3x
x = (-6) / 3
x = (-2)
b)
3 - 7x = 3x + 2
3 - 2 = 3x + 7x
1 = 10x
x = 1 / 10