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x = 4+5
x = 9
2-x=-4
2+4 = x
6 = x
x+10=0
x = -10
t-3=1
t = 1+3
t = 4
a) x - 5 = 4
x = 4 + 5
x = 9 → respuesta
b) 2 - x = -4
-x = -4 -2
-x = -6
x = 6 → respuesta
c) x + 10 = 0
x = 0 -10
x = -10 → respuesta
d) t - 3 = 1
t = 1 + 3
t = 4 → respuesta