noemi12
noemi12
25-08-2017
Mathematics
contestada
How to solve step by step
Respuesta :
gchaching
gchaching
25-08-2017
a/7 + 5/7 = 2/7
1/7a + 5/7 = 2/7
1/7a + 5/7 - 5/7 = 2/7 - 5/7
1/7a = -3/7
7*(1/7a) = 7*(-3/7)
a = -3
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