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0.5x = 0.2x + 30
Se trata de una ecuación lineal con una incógnita.
Solución por el método convencional
0.5x - 0.2x = 30
0.3x = 30
x = 30/(0.3)
= 300/3
x = 100
tenemos:
=>0.5x = 0.2x + 30
resolvemos:
=>0.5x=0.2x+30
=>0.5x-0.2x=30
=>0.3x=30
=>x = 30/0.3
=>x= 300/3
=>x = 100=>respuesta
verificamos:
=>0.5x=0.2x+30
=>0.5(100)=0.2(100)+30
=>50=20+30
=>50=50
igualdad verdadera
espero ayude