Question

Решите на множестве Z уравнения: 3х+17=-13 4х-5= -21

Answer 1

$3x + 17 = - 13 \\ 3x = - 13 - 17 \\ 3x = - 30 \\ x = - 30 \div 3 \\ x = - 10 \\ \\ \\ 4x - 5 = - 21 \\ 4x = - 21 + 5 \\ 4x = - 16 \\ x = - 16 \div 4 \\ x = - 4$