Question

1) Calcule o valor de x, nas equação a seguir:
a) 2x + 1 = 5
b) 4x + 3 = 11
c) 4x + 8 = 3x - 5
d) 3x - 4 = x + 1
e) 9x - 11 = -2
f) 5x - 1 = 8x + 5​

Answer 1

a) 2x + 1 = 5

2x=6

x=6/2

x=3

b) 4x + 3 = 11

4x= 11-3

x= 8/4

x= 2

c) 4x + 8 = 3x - 5

4x-3x= -5-8

x= -13

d) 3x - 4 = x + 1

3x-x= 1+4

2x= 5

x=5/2

x= 2,5

e) 9x - 11 = -2

9x= 11-2

x= 9/9

x=1

f) 5x - 1 = 8x + 5

5x-8x= 5+1

-3x = 6 (X-1)

3x= -6

x= -6/3

x= -2