Respuesta:
a + b = 7
a - b =1
( a + b + c ) = 20
Explicación paso a paso:
a = 4
b = 3
c = 12
a + b
= 4 + 3
= 7
a - b
= 4 - 3
= 1
( a + b ) + c
= 7 + 12
= 20
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Respuesta:
a + b = 7
a - b =1
( a + b + c ) = 20
Explicación paso a paso:
a = 4
b = 3
c = 12
a + b
= 4 + 3
= 7
a - b
= 4 - 3
= 1
( a + b ) + c
= 7 + 12
= 20