5x+11=3x-1 -7x=6x-39 -3.6+x=-28+9.7 16-(x-8)=0.85-20 36-(8-x)=x+2-(5-x)
Mathématiques
wac2002
Question
5x+11=3x-1
-7x=6x-39
-3.6+x=-28+9.7
16-(x-8)=0.85-20
36-(8-x)=x+2-(5-x)
-7x=6x-39
-3.6+x=-28+9.7
16-(x-8)=0.85-20
36-(8-x)=x+2-(5-x)
1 Réponse
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1. Réponse anylor
5x+11=3x-1
5x -3x = -11 -1
2x = -12
x = -12/2
x = -6
-7x=6x-39
39= 6x+7x
39 = 13x
x =39/13
x=3
-3.6+x=-28+9.7
x = -28 +9.7 +3.6
x= -14,7
16-(x-8)=0.85-20
16 -x +8 = -19,15
24 +19.15 = x
x= 43,15
36-(8-x)=x+2-(5-x)
36-8+x = x+2 -5 +x
36-8-2+5 = -x +2x
31 = x
x=31