知a+a+a+b+b=54,a+a+b+b+b=56,那么a,b的值各是多少急及急································

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知a+a+a+b+b=54,a+a+b+b+b=56,那么a,b的值各是多少急及急································
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知a+a+a+b+b=54,a+a+b+b+b=56,那么a,b的值各是多少急及急································
知a+a+a+b+b=54,a+a+b+b+b=56,那么a,b的值各是多少
急及急································

知a+a+a+b+b=54,a+a+b+b+b=56,那么a,b的值各是多少急及急································
3a+2b=54 (1)
2a+3b=56 (2)
(1)+(2)
5a+5b=110
3a+3b=66 (3)
(3)-(2)
a=10
(3)-(1)
b=12
a=10 b=12

3a+2b=54,2a+3b=56
a=10,b=12

a=10 b=12