Sagot :
Réponse :
EXERCICE 1
a) *10
3(10-5) + (80 + 2) = 70 - 9
15 + 82 = 61
97 = 61 FAUX
b)
2(10 -3)-(10+5)=4
2 x 7 - 15 = 4
14 - 15 = 4
-1 = 4 FAUX
c)
3(10 + 1) - 2(30+3) = 0
33 - 66 = 0
-33 = 0 FAUX
*2
a) 3(-3) + 18 = 14 -9
-9+18=5
9=5 FAUX
b) 2(-1)-7=4
-2-7=4
-9=4 faux
c) 3(3)-2(9)=0
9-18=0
-9=0 FAUX
*0
a) 3(-5)+2=-9
-15+2=-9
-13=-9 FAUX
b) 2(3)-5=4
6-5=4
1=4 FAUX
c) 3(0+1) - 2(0 + 3) = 0
3 - 6 = 0
-3 = 0 FAUX
*-3
a) 3(-3 - 5) + (-21 + 2) = -21 - 9
-24 + -19 = -30
-43 = -30 FAUX
b) 2 (-6) - (-3 +5) = 4
-12 - 2 = 4
-14 = 4 FAUX
c) 3 (-2) - 2(-9+3) = 0
-6 +12 =0
6 = 0 FAUX
*-5
a) 3(-10) + (-38) = -35 -9
-30 - 38 = -44
-68 = -44 FAUX
b) 2(-8) - (0) = 4
-16 -0 = 4 FAUX
c) 3(-4) - 2(-12) = 0
-12 + 24 =0
12 = 0 FAUX
a) 3(x-5)+(8x+2)=7x-9
3x-15+8x+2-7x+9=0
4x-4=0
4x=4
x= 4/4=1
b) 2(x-3)-(x+5)=4
2x-6-x-5-4=0
x-15=0
x=15
c) 3(x+1)-2(3x+3)=0
3x+3-6x-6=0
-6x-3=0
6x=-3
x=-3/6=-1/2
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