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Answer:
a.9
b.36
Step-by-step explanation:
Blue beans + orange beans + red beans = 54
6x + 2x-3 + 15-x = 54
6x+2x-x=54+3-15
7x=42
divide both sides by 7
x=6
a. orange beans = 2x-3
but x=6
2(6)-3
12-3
=9
b.blue beans =6x
6(6)
=36