SALUT JAI UN DM AIDEZ MOI SVP C'EST LE NUMERO 51 merci :).... Pergunta de ideia de972astrude

April 2019 1 84 Report

SALUT JAI UN DM AIDEZ MOI SVP
C'EST LE NUMERO 51
merci :)

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Verified answer

Bonjour

a = 6 x - 9 = 4 x + 20 (produit en croix)
a = 6 x - 4 x = 20 + 9
a = 2 x = 29
a = x = 29/2

b/ 20 x + 5 = 60 x - 12 ( on met sur 20)
20 x - 60 x = - 12 - 5
- 40 x = - 17
x = 17/40

c/ 2 x + 6 = 8 x - 10 (on met sur 2)
2 x - 8 x = - 10 - 6
- 6 x = - 16
x = 16/6 ou 8/3

d/ 2 x - 3/7 = x/3 + 2/5
2 x - x/3 = 2/5 + 3/7 (on met sur 105)
210 x - 35 x = 42 + 45
175 x = 87
x = 87/175