3,8a+7,7+1,7b+2,5a+11,2+4,6b, если a+b+3=10
1) 3.8A + 7.7 + 1.7B + 2.5A + 11.2 + 4.6B = 6.3A + 6.3B + 18.9 = = 6.3*( A + B + 3 ) 2) A + B + 3 = 10 6.3 * ( A + B + 3 ) = 6.3 * 10 = 63 ОТВЕТ: 63