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a fost răspuns

3×-10=2×+5
-4×+9=6×-11
2(×-3)+5(×-6)=7
×-1 supra 14-×-3supra 2=×
2×+5supra2+ ×-3supra 5 =1supra 13
(2×+1)la a 2 a -4=(2×+3)(2×-3)
urgent va rog
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Răspuns :

a) 3x-10=2x+5

3x=2x+15

x=15

b) -4x+9=6x-11

-4x=6x-20

-10x=-20

10x=20

x=20:10

x=2

c) 2(x-3)+5(x-6)=7

2x-6+5x-30=7

7x+36=7

37=7-7x

30=-7x

-7x=30

-x=30:7

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