Resolva as equações: a) 6x – 7 = 3x + 4 b) 5x = 15 _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ c) 2x – 4 = 8 d) 7( x – 5 ) = 3( x + 1 ) _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________
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Resposta:
a) 6x – 7 = 3x + 4
x = 11/3
b) 5x = 15
x = 3
c) 2x – 4 = 8
x = 6
Explicação passo-a-passo:
a) 6x – 7 = 3x + 4
6x-3x = 4+7
3x = 11
x = 11/3
b) b) 5x = 15
x=15/5
x = 3
c) 2x – 4 = 8
2x= 8+4
2x = 12
x = 12/2
x = 6
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