Respuestas
DATOS :
Relaciona cada ecuación con su solución =?
SOLUCIÓN :
a ) x + 1.8 = 5.3 ( c) 8.1
x = 5.3 -1.8 = 3.5
b ) x - 1/3 = - 4/5 (a ) 3.5
x = -4/5 + 1/3 = -7/15
c) 2x + 2.1 = 18.3 ( b) -7/15
x = ( 18.3 -2.1) /2
x = 8.1 .
d) 3/4x + 2 = 1/8 ( d) -5/2
3/4x = 1/8 -2
3/4x = -15/8 ( f) -20.3
x = -15/8/3/4
x = -5/2
e) x-4 = 1/3 (e) 13/3 .
x = 1/3 + 4
x = 13/3
f) 2+x = -18.3
x = -18.3 -2 = -20.3.