Question

Помогите решить хотя бы пару заданий.

Answer 1

$a). \: y = - 2 \times ( - 3.5) + 8 = 15 \\ b) \: 5.5 = - 2x + 8 \\ 2x = 8 - 5.5 \\ 2x = 2.5 \\ x = 2.5 \div 2 \\ x = 1.25 \\ b = - 2 \times ( - 1.5) + 8 = 3 + 8 = 11 \: da \: tochka \: b \: prohodit \\ \\ 18x - 4 = - 2x + 16 \\18x + 2x = 16 + 4 \\ 20x = 20 \\ x = 1 \\ y = 18 \times 1 - 4 = 14 \\ tochki \: peresechenia \: (1 \: i \: 4)$