Question

Resolva a equação do 1 grau em IR:

a) 10x+16=14+8
b) 2(x-3)=-3(x-3)
c) x/2+x/3-x/4=14
d) x+x/2+3x/4=18​

Answer 1

Resposta:

a)

10x+16=14+8

 10x=14+8-16

10x=6

x=6/10 (simplifica por 2)

x=3/5

b)

2(x-3)=-3(x-3)

2x-6=-3x+9

2x+3x= 9+6

5x=15

x=15/5

x=3

c)

x/2+x/3-x/4=14

5x/6-x/4=14

7x/12=14

7x=14 . 12

7x=168

x=168/7

x=24

d)

x+x/2+3x/4=18​

x+5x/4= 18

9x/4= 18

9x=18.4

9x=72

x=72/9

x=8