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solniwko [45]
3 years ago
15

12r2s + 21rs2 – 3rs=

Mathematics
1 answer:
Nitella [24]3 years ago
6 0
Answer:
63rs

explanation:
collect like terms
12*2=24rs
21*2=42rs
then add 24+42=66rs
then subtract 3rs
then just add rs
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