Respuesta:x +20 = 2×+10
10 = ×
×+30 = y
40 = y
E = y - x = 40 - 10 = 30
Explicación paso a paso: x+20=2x+10
20-10=2x-x
10=x
--------------------
x+30=y
10+30=y
40=y
--------------
E= y-x
E=40-10
E=30
-------------
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Respuesta:x +20 = 2×+10
10 = ×
×+30 = y
40 = y
E = y - x = 40 - 10 = 30
Explicación paso a paso: x+20=2x+10
20-10=2x-x
10=x
--------------------
x+30=y
10+30=y
40=y
--------------
E= y-x
E=40-10
E=30
-------------