Найдите значение выражения:
1)3(a+2b)-a при a+3b=1,1
2)2,4 (3x+5y)-4y при 0.9x+y=2
3)8(0.5a+3b)+8a при a+2b=2,5
4)3(0.6m+5n)-3n при 0,3m+2n=4
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