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Laianevavi
@Laianevavi
December 2019
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Resolva o sistema pelo método da substituição
-6x+2y=8
9x-y=8
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exalunosp
- 6x + 2y = 8 ( 1 )
9x - y = 8 >>>>> -y = 8 - 9x ou y = 9x - 8 **** substitui em (1)
-6x +2 ( 9x - 8) = 8
-6x + 18x - 16 = 8
12x = 8 + 16
12x = 24
x = 24/12 = 2****
y = 9 ( 2) - 8
y = 18 - 8
y = 10 *****
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9x - y = 8 >>>>> -y = 8 - 9x ou y = 9x - 8 **** substitui em (1)
-6x +2 ( 9x - 8) = 8
-6x + 18x - 16 = 8
12x = 8 + 16
12x = 24
x = 24/12 = 2****
y = 9 ( 2) - 8
y = 18 - 8
y = 10 *****