{3A = 7B
A=160-B
3(160-B)=7B
480-3B=7B
7B=480-3B
7B+3B=480
10B=480
B=480/10
B=48
SE B=48, ENTÃO
A+48=160
A=160-48
A=112
48-C=22
-C=22-48
-C=-26
C=26
A=112, B=48, C=26
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{3A = 7B
A=160-B
3(160-B)=7B
480-3B=7B
7B=480-3B
7B+3B=480
10B=480
B=480/10
B=48
SE B=48, ENTÃO
A+48=160
A=160-48
A=112
48-C=22
-C=22-48
-C=-26
C=26
A=112, B=48, C=26