Question

Calcule o valor de x :
A) 2× +4=×-6
B) 3×=15
C) 4×-2=18
D) 2×+5=25
E)6×+2=-2×+14
F) 3(×+1)=12
G) 5(×+2)=2(×-2)
H)9×-4=54

Por favor me ajudem ,é urgente

Answer 1

a) 2x +4 = x -6
2x -x = -6 -4
x = -10

b) 3x = 15
x = 15/3
x = 5

c) 4x -2 = 18
4x = 18 +2
4x = 20
x = 20/4
x = 5

d) 2x +5 = 25
2x = 25 -5
2x = 20
x = 20/2
x = 10

e) 6x +2 = -2x +14
6x +2x = 14 -2
8x = 12
x = 12/8

f) 3(x +1) = 12
3x +3 = 12
3x = 12 -3
3x = 9
x = 9/3
x = 3

g) 5(x +2) = 2(x -2)
5x +10 = 2x -4
5x -2x = -4 -10
3x = -14
x = -14/3

h) 9x -4 = 54
9x = 54 +4
9x = 58
x = 58/9