Найдите сумму корней уравнений: 1.3х=-7.8 и (1.8х+3.7)-1,4=6.3+5.9
1)1.3х=7.8 х=7.8:1.3 х=6 2)(1.8х+3.7)-1.4=6.3+5.9 1.8х+3.7-1.4=6.3+5.9 1.8х=6.3+5.9-3.7+1.4 1.8х=9.9 х=9.9:1.8 х=5.5