Question

Si (12-a)-42=85; (b+6)-42= -21
Si A =a + b - 25; entonces es:

Answer 1

a=115
b=15
A=115+15-25
A=105

Answer 2

Reemplezamos:

127 - 42= 85
Entonces: (12-a) = 127
(12-a) = 127
     -a = 127-12
     -a = 115
      a = -115

21- 42 = -21
Entonces:
(b+6)= 21
b+ 6 = 21
     b = 15

A = a + b - 25
A = -115 + 15 - 25
A = -125