Respuesta:
3c+3=15
3c=15-3
3c=12
c=4
3y+6=9
3y=9-6
3y=3
y=1
5a-10=30
5a=30+10
5a=40
a=8
3b+9=15
3b=15-9
3b=6
b=2
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Respuesta:
3c+3=15
3c=15-3
3c=12
c=4
3y+6=9
3y=9-6
3y=3
y=1
5a-10=30
5a=30+10
5a=40
a=8
3b+9=15
3b=15-9
3b=6
b=2