Associe as equações equivalentes:
A)2x + 1 = 11
B)x-3 = 8
C)5x = -45
D)4x - 10 =30
( ) 2 (x+3)= -12
( ) 4 (x -2)=32
( ) 3x + 4 =19
( ) x + 4 =15
A)2x + 1 = 11
B)x-3 = 8
C)5x = -45
D)4x - 10 =30
( ) 2 (x+3)= -12
( ) 4 (x -2)=32
( ) 3x + 4 =19
( ) x + 4 =15
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2x = 11 - 1
2x = 10
x = 10/2 = 5
B) x-3 = 8
x = 8 + 3
x = 11
C) 5x = -45
x = -45/5
x = -9
D) 4x - 10 =30
4x = 30 + 10
4x = 40
x = 40/4
x = 10
(C) 2 (x+3)= -12
2x + 6 = -12
2x = -12 - 6
2x = -18
x = -18/2
x = -9
(D) 4 (x -2)=32
4x -8 = 32
4x = 32 + 8
4x = 40
x = 40/4
x = 10
(A) 3x + 4 =19
3x = 19 - 4
3x = 15
x = 15/3
x = 5
(B) x + 4 =15
x = 15 -4
x = 11
2x=1-11
2x=10, donde x=2