Réponse :
1) 4+2x+5=18
9+2x=18
2x=18-9
2x=9
x= 9/2
2)2(x+8)-1=32
2x+16-1=32
2x+15=32
2x=32-15
2x=17
x= 17/2
Réponse:
1) 2x=18-5-4
x=9/2
x=3,5
2) 2x+16-1=32
2x=32-16+1
x=17/2
x=8,5
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Réponse :
1) 4+2x+5=18
9+2x=18
2x=18-9
2x=9
x= 9/2
2)2(x+8)-1=32
2x+16-1=32
2x+15=32
2x=32-15
2x=17
x= 17/2
Réponse:
1) 2x=18-5-4
2x=9
x=9/2
x=3,5
2) 2x+16-1=32
2x=32-16+1
2x=17
x=17/2
x=8,5