Answer:
The first is -4 and the second is 10
Step-by-step explanation:
30$
1st sister is 3x
2nd sister 2x
3th is x
3x+2x+x=180
6x=180
X=30
-3x+42+9x=6x+42
0x=0
x=0
there is no solution
Step-by-step explanation
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