7a + 40 -10= 5a + 60 - 20
7a + 30 = 5a + 40
7a - 5a = 40 - 30
2a = 10
a = 10 / 2
a = 5
Comprobación
7 (5) + 40 - 10 = 5 (5) + 60 - 20
35 + 40 - 10 = 25 + 60 - 20
65 = 65
Dicha solución es verdadera
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Verified answer
Respuesta:
A) 5
7a + 40 -10= 5a + 60 - 20
7a + 30 = 5a + 40
7a - 5a = 40 - 30
2a = 10
a = 10 / 2
a = 5
Comprobación
7a + 40 -10= 5a + 60 - 20
7 (5) + 40 - 10 = 5 (5) + 60 - 20
35 + 40 - 10 = 25 + 60 - 20
65 = 65
Dicha solución es verdadera
S A L U D O S