Question

Resolva as seguintes equacoes do 1° grau com uma incognita em R
A) 4X-1=3x+2.(x-5)
B) 2(x-1)-4(2x+1)=2x-1-8
C) 2(x+5)=2-3(2+3x)+15
Me ajudem por favor

Answer 1

A) 4x-1=3x+2x-10
4x-5x=-10+1
-x=-9.(-1)
x=9
B)2x-2-8x-4=2x-9
-6x-6=2x-9
-6x-2x=-9+6
-8x=-3(-1)
x=3/8
C)2x+10=2-6-9x+15
2x+9x=2-6+15-10
11x=1
x=1/11

Answer 2

Olá,

Vamos lá,

A) 4X-1=3x+2.(x-5)
4x-1=3x+2x-10
4x-3x-2x=-10+1
-x=-9    *(-1)
x =9

B) 2(x-1)-4(2x+1)=2x-1-8
2x-2-8x-4=2x-1-8
2x-8x-2x=-1-8+2+4
-8x= -3   *(-1)
8x=3
x =3/8

C) 2(x+5)=2-3(2+3x)+15
2x + 10=2 -6-9x+15
2x+9x=2-6+15-10
11x=1
x = 1/11