Question

Resolva as equações de 1° grau
a)2x = 2+3+x
b) x+x = 16-2
c) 3x = -x+16
d) 2x+2 = 12
e) 2x+10 = 20​

Answer 1

a) 2x = 2 + 3 + x

2x - x = 2 + 3

x = 5

b) x + x = 16 - 2

2x = 14

x= 14/2

x=7

c) 3x = -x + 16

3x + x = 16

4x = 16

x = 16/4

x = 4

d) 2x + 2= 12

2x = 12 - 2

2x = 10

x = 10/2

x = 5

e) 2x + 10 = 20

2x = 20 - 10

2x = 10

x = 10/2

x = 5