a) 6 x = 2x + 16 b) 2 x - 5 = x + 1 c) 2 x + 3 = x + 4 d)- 5x + 7 = 4x + 10 e) 4 x - 10 = 2x + 2 f) 4 x - 7 = 8x - 2 g) 2 x + 1 = 4x - 7 h) -9 x + 9 - 3x = 15 i) 16 x - 1 = 12 x + 3 j) 3 x. - 2 = 4x .+ 3 k) 5 x - 3 + x = 2x + 9 l) 17 x - 7x = x + 18 m) x + x. Menos 4 = 17 - 2x + 1 n) 4 x - 1 = 3.( x-1)
Respostas
Explicação passo a passo:
A) 6x = 2x +16
6x - 2x = 16
4x = 16
x = 16/4
x = 4
B) 2x - 5 = x
2x-x = 5
x = 5
C) 2x + 3 = x+4
2x-x = 4-3
x = 1
D) -5x + 7 = 4x +10
-5x - 4x = 10 - 7
- 9x = 3
(-9x = 3) * -1
9x = -3
x = - 3/9
x = -1/3
E) 4x - 10 = 2x + 2
4x - 2x = 2+10
2x = 12
x = 12/2
x = 6
F) 4x - 7 = 8x - 2
-7 + 2 = 8x - 4x
-5 = 4x
4x = -5
x = -( 5 / 4) ou x = -1,25
G) 2x +1 = 4x -7
1+7 = 4x -2x
8 = 2x
2x = 8
x = 8/2
x= 4
H) -9x+9-3x = 15
-12x = 15-9
-12x = 6
x = 6 / -12
x = - 1/2
I) 16x -1 = 12x +3
16x-12x = 3+1
4x = 4
x = 4/ 4
x = 1
J) 3x - 2 = 4x + 3
-2 -3 = 4x - 3x
-5 = x
x= -5
K) 5x-3+x=2x+9
6x-2x = 9+3
4x = 12
x = 12/4
x = 3
L) 17x-7x = x +18
10x-x=18
9x = 18
x = 18/9
x = 2
M) x+x-4=17-2x+1
2x-4= 18-2x
2x+2x = 18+4
4x = 22
x= 22/4 > 11/2 > 5,5
n) 4x - 1 = 3(x-1)
4x-1 = 3x-3
4x - 3x = -3+1
x = -2