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rautouoceane
@rautouoceane
April 2023
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calcul c'est équation avec le détail des calculs :
a 22x+458= 10x-70
b -10x + 4,5 = -8x +3,2
c -8(9x-6)=-34x-218
d 7(8x+7)=54x-175
e 6(7x+5)=-39x-228
f 31x-2335=9(6x-9)
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Nessouuuuuuu
a) 22x + 458 = 10x - 70
22x - 10x = -70 - 458
12x = -528
x = -44
b) -10x + 4,5 = -8x + 3,2
-10x + 8x = 3,2 - 4,5
-2x = -1,3
x = 0,65
c) -8(9x - 6) = -34x - 218
-72x + 48 = -34x - 218
-72x + 34x = -218 - 48
-38x = -266
x = 7
d) 7(8x + 7) = 54x - 175
56x + 49 = 54x - 175
56x - 54x = -175 - 49
2x = -224
x = -112
e) 6(7x + 5) = -39x - 228
42x + 30 = -39x - 228
42x + 39x = -228 - 30
81x = -258
x = -3,19 —> arrondi à deux décimales
f) 31x - 2335 = 9(6x - 9)
31x - 2335 = 54x - 81
31x - 54x = -81 + 2335
-23x = 2254
x = -97,91 —> arrondi directement à deux décimales
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Lista de comentários
22x - 10x = -70 - 458
12x = -528
x = -44
b) -10x + 4,5 = -8x + 3,2
-10x + 8x = 3,2 - 4,5
-2x = -1,3
x = 0,65
c) -8(9x - 6) = -34x - 218
-72x + 48 = -34x - 218
-72x + 34x = -218 - 48
-38x = -266
x = 7
d) 7(8x + 7) = 54x - 175
56x + 49 = 54x - 175
56x - 54x = -175 - 49
2x = -224
x = -112
e) 6(7x + 5) = -39x - 228
42x + 30 = -39x - 228
42x + 39x = -228 - 30
81x = -258
x = -3,19 —> arrondi à deux décimales
f) 31x - 2335 = 9(6x - 9)
31x - 2335 = 54x - 81
31x - 54x = -81 + 2335
-23x = 2254
x = -97,91 —> arrondi directement à deux décimales