Respuesta:
Explicación paso a paso:
a) 20x - 250 = 320 - 18x
20x + 18x = 320 + 250
38x = 570
x = 570/38
x = 15
b) 32 + x = 52
x = 52 - 32
x = 20
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Respuesta:
A) 15 B) 20
Explicación paso a paso:
a) 20x - 250 = 320 - 18x
20x + 18x = 320 + 250
38x = 570
x = 570/38
x = 15
b) 32 + x = 52
x = 52 - 32
x = 20