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BiaaH12Morais
@BiaaH12Morais
July 2019
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Resolva essas equações
a) 3x-20=2x+10
b)x+15=2x-6
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leonardosa8000
A) 3x-20=2x+10
3x-2x=10+20
x=30
b)x+15=2x-6
x-2x=-15-6
-x=-21 (-1) multiplicamos por -1
x=21
2 votes
Thanks 1
BiaaH12Morais
Agr percebi oque eu estava fazendo errado
BiaaH12Morais
vlw
lili3379
A)3x-2x=20+10
1x=30
30:1
X=30
B)X-2x= -15-6
-1x=21
21:-1
X =-21
1 votes
Thanks 0
BiaaH12Morais
no caso seria +21 nn -21
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3x-2x=10+20
x=30
b)x+15=2x-6
x-2x=-15-6
-x=-21 (-1) multiplicamos por -1
x=21
1x=30
30:1
X=30
B)X-2x= -15-6
-1x=21
21:-1
X =-21