Bonsoir,
x
x+4
5(x+4) =5x+20
5x+20 -2 = 5x+18
(5x+18)/7 = 24
5x+18 = 24 *7 = 168
5x = 168 -18 = 150
x= 150/5 = 30
x=30
vérif:
30
30+4 = 34
34*5 = 170
170-2 = 168
168/7 = 24
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Bonsoir,
x
x+4
5(x+4) =5x+20
5x+20 -2 = 5x+18
(5x+18)/7 = 24
5x+18 = 24 *7 = 168
5x = 168 -18 = 150
x= 150/5 = 30
x=30
vérif:
30
30+4 = 34
34*5 = 170
170-2 = 168
168/7 = 24