ayudenme con estas operaciones¡¡¡¡
x+4=12
7x=49
3x=9
x+15=36
4x+2x=20
x+4=12
7x=49
3x=9
x+15=36
4x+2x=20
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Respuesta:
x+4=12
x=12-4
x=8
7x=49
x=49/7
x=7
3x=9
x=9/3
x=3
x+15=36
x=36-15
x=21
4x+2x=20
6x=20
x=20/6
x=3.33..
Espero te ayude ;D