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Lisa44566
@Lisa44566
May 2019
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Bonjour,pouvez vous m’aider a résoudre ces deux équations :
a)2(3x+4)-5(1-2x)=7(2x-3)+12
b)2x+1:2-x:3=x-5:6
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étoileebleu
Verified answer
bonsoir,
2(3x+4)-5(1-2x)=7(2x-3)+12
6x +8 -5 +10x = 14x -21 +12
16x +3 = 14x -9
16x -14x = -9 -3
2x = -12
x = -12/2
x=-6
2x+1:2-x:3=x-5:6
2x-x:3-x=-5:6-1:2
[3(2x)-x-3x]:3= -8:6
(12x-2x-6x):6= -8:6
12x-2x-6x=-8
4x= -8
x= -8:4
x= -2
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Verified answer
bonsoir,2(3x+4)-5(1-2x)=7(2x-3)+12
6x +8 -5 +10x = 14x -21 +12
16x +3 = 14x -9
16x -14x = -9 -3
2x = -12
x = -12/2
x=-6
2x+1:2-x:3=x-5:6
2x-x:3-x=-5:6-1:2
[3(2x)-x-3x]:3= -8:6
(12x-2x-6x):6= -8:6
12x-2x-6x=-8
4x= -8
x= -8:4
x= -2