Question

resolva as equações:
a) 5x + 15 = x - 1
b) 2x - 10 = x
c) x + 5 = 3 - x
d) 3x + 11 = 2
e) 10 - x = x​

Answer 1

a) 5x + 15 = x - 1

5x - x = -1 - 15

4x = -16

x = -16/4

x = -4

b) 2x - 10 = x

2x - x = 10

x = 10

c) x + 5 = 3 - x

x + x = 3 - 5

2x = -2

x = -2/2

x = -1

d) 3x + 11 = 2

3x = 2 - 11

3x = -9

x = -9/3

x= -3

e) 10 - x = x

10 = x + x

10 = 2x

x = 10/2

x = 5