Diviértete hallando el valor de la incógnita a) 3x + 2 - 5 = x + 5
b) x + 8 - 2x = 18 + x
c) 5x + 8 - 7x = 3x + 9 - 7x
d) 4x + 2(x +3) = 2 (x +2 )
e) x (x+2) + 21 = (x+2) (x+3)
f) -50 = x - (x - 20) + 60 + (20 - x)
g) -4 (x - 20) + 7 (15 - x) + 5(x - 8) + 20 = 0
b) x + 8 - 2x = 18 + x
c) 5x + 8 - 7x = 3x + 9 - 7x
d) 4x + 2(x +3) = 2 (x +2 )
e) x (x+2) + 21 = (x+2) (x+3)
f) -50 = x - (x - 20) + 60 + (20 - x)
g) -4 (x - 20) + 7 (15 - x) + 5(x - 8) + 20 = 0
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