Răspuns :
Explicație pas cu pas:
3(2x-11)= 2x-41
6x - 33 = 2x - 41
6x - 2x = 33 - 41
4x = (-8) / : 4
x = - 2
b) 11x-1=4(7x+5)
11x - 1 = 28x + 20
11x - 28x = 20 + 1
- 17x = 21 / × (-1)
17 x = -21
x = - 21 / 17
x = -1 4/17
c)5(1-4x)=-7-16x
5 - 20x = -7 - 16x
-20x + 16 x = -7 -5
-4x = - 12 /×(-1)
4x = 12 / : 4
x = 3
d)2(5×-4)=7x-20
10x - 8 = 7x - 20
10x - 7x = 8 - 20
3x = -12 / :3
x = -4
e)20x+13=6(5x-7)
20x + 13 = 30x - 42
20x - 30x = -13 - 42
-10x = - 55 / ×(-1)
10x = 55 / :5
2x = 11
x = 11/2
x = 5 1/2
Răspuns:
Explicație pas cu pas:
a) 3(2x-11)= 2x-41 6x-33=2x-41 4x=33-41 4x=-8 x=-2
b) 11x-1=4(7x+5) 11x-1=28x+20 17x=-21 x=-21/17
c)5(1-4x)=-7-16x 5-20x=-7-16x 4x=12 x=3
d)2(5×-4)=7x-20 10x-8=7x-20 3x=-12 x=-4
e)20x+13=6(5x-7) 20x+13=30x-42 10x=55 x=5,5