bonjour
n
3 n /7
3 n / 7 + 5
( 3 n / 7 + 5 ) : 1 /5
( 3 n / 7 + 5 ) x 5
= 15 n /7 + 25
15 n /7 + 25 = 0
15 n / 7 = - 25
15 n = - 175
n = -175/15 = - 35/ 3
on a choisi - 35/3
- 35/3
- 35/3 * 3/7 = - 105/21
- 105/21 + 5 = - 105/21 + 105/21 = 0
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bonjour
n
3 n /7
3 n / 7 + 5
( 3 n / 7 + 5 ) : 1 /5
( 3 n / 7 + 5 ) x 5
= 15 n /7 + 25
15 n /7 + 25 = 0
15 n / 7 = - 25
15 n = - 175
n = -175/15 = - 35/ 3
on a choisi - 35/3
- 35/3
- 35/3 * 3/7 = - 105/21
- 105/21 + 5 = - 105/21 + 105/21 = 0