X + 3 =11
X - 5 =7
X - 8=20
X + 2 =1
X + -3 =7
X - 8 = -3
8 + x = -9
-12 + x =-9
-5 + z =-3
X - 5 =7
X - 8=20
X + 2 =1
X + -3 =7
X - 8 = -3
8 + x = -9
-12 + x =-9
-5 + z =-3
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Respuesta:
x+3=11 , x = 9
X - 5 =7, x = 12
X - 8=20, x =28
X + 2 =1, x = -1
X + -3 =7, x = 10
X - 8 = -3, x = 5
8 + x = -9, x = -17
-12 + x =-9, x = 3
-5 + z =-3, z = 2
Explicación paso a paso:
x + 3 = 11
11 - 3 = x
9 = x
x = 9
Espero te sirva :3