Calcule as equaçãoes a seguir, determinando x de cada uma.
a)6x+x=14
b)x+7=0
c)7x+1-5x=9
d)21x+1=11x+6
a)6x+x=14
b)x+7=0
c)7x+1-5x=9
d)21x+1=11x+6
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Verified answer
A)6x+x= 14
7x= 14
x= 14/7
x= 2
b)
x+7= 0
x= -7
c)
7x+1-5x= 9
2x= 8
x= 8/2
x= 4
d)
21x+1= 11x+6
10x= 5
x= 5/10
x= 1/2 ou 0,5
Beleza?
Vamos lá,
a)6x+x=14
7x=14
x=14/7
x=2
b)x+7=0
x=-7
c)7x+1-5x=9
7x-5x=9-1
2x=8
x=8/2
x=4
d)21x+1=11x+6
21x-11x=6-1
10x=5
x=5/10
x=1/2
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