resolva as equações do 1 grau :
a) 5x - 3 ( x + 2 ) = 15
b) 2x + 3x + 9 - 8 ( 6 - x )
c) 4 ( x + 10 ) - 2 ( x - 5 ) = x - 5
d) ( 4x + 6 ) - 2x = ( x - 6 ) + 10 + 14
e) ( x - 3 ) - ( x + 2 ) + 2 ( x - 1 ) - 5 = 0
f) 3x - 2 ( 4x - 3 ) = 2 - 3 ( x - 1 )
g) 3 ( x - 1 ) - ( x - 3 ) + 5 ( x - 2 ) = 18
Soluções para a tarefa
Resposta:
A)R:10,5
C)R:-55
D)R:12
E)R:6
F)R:0,5
G)R:4
Explicação passo-a-passo:
A)5x-3.(x+2)=15
5x-3x-6=15
5x-3x=15+6
2x=21
x=21/2
x=10,5
B)preciso saber aonde fica o = senão fica errado
C)4.(x+10)-2.(x-5)=x-5
4x+40-2x+10=x-5
4x-2x-x=-5-40-10
x=-55
D)4x+6-2x=x-6+10+14
4x-2-x=-6+10+14-6
x=12
E)x-3-x-2+2.(x-1)-5=0
x-3-x-2+2x-2-5=0
x-x+2x=3+2+2+5
2x=12
x=12/2
x=6
F)3x-2.(4x-3)=2-3.(x-1)
3x-8x+6=2-3.(x-1)
3x-8x+3x=2+3-6
-2x=-1
x=-1/-2
x=0,5
G)3.(x-1)-(x-3)+5.(x-2)=18
3x-3-x+3+5x-10=18
3x-x+5x=18+10+3-3
7x=28
x=28/7
x=4
Resposta:Segue as contas abaixo na explicação
Explicação passo-a-passo:
a) 5x - 3 ( x + 2 ) = 15 b) 2x + 3x + 9 - 8 ( 6 - x )
5x-3x-6=15 5x+9-48+8x=0
2x-6=15 13x-39=0
2x=15+6 13x=39
2x=21 x=39/13
x=21/2 x=3
c) 4 ( x + 10 ) - 2 ( x - 5 ) = x - 5 d) ( 4x + 6 ) - 2x = ( x - 6 ) + 10 + 14
4x+40-2x+10=x-5 4x+6-2x=x-6+24
2x+50=x-5 2x+6=x+18
2x-x=-5-50 2x-x=18-6
x=-55 x=12
e) ( x - 3 ) - ( x + 2 ) + 2 ( x - 1 ) - 5 = 0 f) 3x - 2 ( 4x - 3 ) = 2 - 3 ( x - 1 )
x-3-x-2+2x-2-5=0 3x-8x+6=2-3x+3
2x-12=0 -5x+6=5-3x
2x=12 -5x+3x=5-6
x=12/2 -2x=-1(-1)
x=6 2x=1
x=1/2
g) 3 ( x - 1 ) - ( x - 3 ) + 5 ( x - 2 ) = 18
3x-3-x+3+5x+10=18
8x-x+10=18
7x+10=18
7x=18-10
7x=8
x=8/7