bonjour
a ) 63 - x = 25
- x = 25 - 63
- x = - 38
x = 38
38 - 45 - 47 - 51 - 63
x - 7 = 25
x = 25 + 7
x = 32
7 - 10 - 15 - 18 - 20 - 23 - 32
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bonjour
a ) 63 - x = 25
- x = 25 - 63
- x = - 38
x = 38
38 - 45 - 47 - 51 - 63
x - 7 = 25
x = 25 + 7
x = 32
7 - 10 - 15 - 18 - 20 - 23 - 32