Answer:
B
Step-by-step explanation:
Step-by-step explanation:
15.50n +10=72
15.50×4+10=72
62+10=72
Same here, we do a quick switcharoo on the variables first,
Let no red ribbons=x
no. Of blue ribbons=x+3
No. Of yellow ribb9ns=x+7
Totsl ribbons=28
28=x+x+3+x+7
28=3x+10
3x=28-10
3x=18
X=18/3
X=6
No .of red ribbons=6
No. Of blue ribbons=x+3=9
No. Of yellow ribbons=x+7=13