Resolva as equaçoes sendo u igual a r?
podem me explicar aqui vao alguns ex:
a)2x igual 6
b)-5x igual 10
c)-6x igual -9
d)2x+5 igual 9
e)x+15 igual -4x
f)x-12 igual 4x
(gente o igual sao aqueles dóis tracinhos ok,eu to no celular e nao tem como colocar)
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a) 2x=6
x=6/2
x=3
b) -5x=10
x=10/-5
x=-2
c) -6x=-9
x=9/6
x= 3/2
d) 2x+5=9
2x=9-5
2x=4
x=4/2
x=2
e) x+15=-4x
x+4x=-15
5x= -15
x= -15/5
x=-3
f) x-12=4x
x-4x=12
-3x=12
x=12/-3
x= -4
Só isso. Extremamente fácil.
Letra a
2x=6
x=6/2
x= 3
Letra b
-5x=10
x=10/-5
x= -2
Letra c
-6x =-9
x= -9/-6
x= 3/2
x= 1,5
Letra d
2x+5=9
2x=9-5
2x=4
x=4/2
x=2
Letra e)
x+15 =-4x
-4x-x=15
-5x=15
x=15/-5
x=-3
Letra f)
x-12 = 4x
4x-x=-12
3x=-12
x= -12/3
x= -4
Para tirar prova é só substituir o valor de x e verás que u=r
a)2x =l 6
x = 6/2
x = 2
b)-5x = 10
x = 10 / -5
x= -2
c)-6x =l -9
x = -9 / -6
x = 3/2
d)2x+5 = 9
2x = 9 - 5
2x = 4
x = 4/2
x =2
e)x+15=l -4x
x + 4x = - 15
5x = - 15
x = -15/5
x = -3
f)x-12 = 4x
x - 4x = 12
- 3x = 12
x = 12/ -3
x = - 4
a)
2x = 6
2x/2 = 6/2
x = 3
b)
-5x = 10
5x = -10
5x/5 = -10/5
x = -2
c)
-6x = -9
6x = 9
x = 9/6 = 3/2
d)
2x + 5 = 9
2x = 9 - 5 = 4
x = 4/2 = 2
e)
x + 15 = - 4x
5x = -15
x = -3
f)
x - 12 = 4x
3x = -12
x = -12/3 = -4
pronto