Question

Resolva ás equações de 1 grau . a)2x+4=28 b)3x-1=26 c)3x-8=x+6 d)5x+6=-3x-10 e)4(x+3)=20

Answer 1

a) 2x+4=28
2x=28-4
2x=24
x=24/2
x=12

b) 3x-1=26
3x=26+1
3x=27
x=27/3
x=9

c) 3x-8=x+6
3x-x=6+8
2x=14
x=14/2
x=7

d)5x+6=-3x-10
5x+3x=-10-6
8x=-16
x=-16/8
x=-2

e)4(x+3)=20
4x+12=20
4x=20-12
4x=8
x=8/4
x=2