Hola
3x+4=25
3x=25 -4
3x=21
x=21 ÷3
x=7
comprobamos:
7+7+7 +4=
21 + 4 =25
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Hola
3x+4=25
3x=25 -4
3x=21
x=21 ÷3
x=7
comprobamos:
7+7+7 +4=
21 + 4 =25