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Abner14
@Abner14
October 2019
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Como resolver é sobre matrizes?
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joseribamar180980
Igualdade de matrizes
a + b = 12. a = 12 - b
-3a + 2b = 9. a = 12 - 15
-3.(12 - b) = 9. a = -3
-36 + 3b = 9
3b = 9 + 36
3b = 45
b = 45/3
b = 15
x + y = 3. x = 3 - y
-x + 2y = 2 x = 3 - 5/3
-(3 - y) + 2y = 2. x = -4/3
-3 + y + 2y = 2
3y = 2 + 3
3y = 5
y = 5/3
1 votes
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Lista de comentários
a + b = 12. a = 12 - b
-3a + 2b = 9. a = 12 - 15
-3.(12 - b) = 9. a = -3
-36 + 3b = 9
3b = 9 + 36
3b = 45
b = 45/3
b = 15
x + y = 3. x = 3 - y
-x + 2y = 2 x = 3 - 5/3
-(3 - y) + 2y = 2. x = -4/3
-3 + y + 2y = 2
3y = 2 + 3
3y = 5
y = 5/3