4х + 18 = 10 и х - 5b = 23
4x = 10 - 18 5b = x - 23
4x = - 8 5b = - 2 - 23
x = - 8 : 4 5b = - 25
x = - 2 b = - 25 : 5
b = - 5
Ответ: при b = (-5).
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4х + 18 = 10 и х - 5b = 23
4x = 10 - 18 5b = x - 23
4x = - 8 5b = - 2 - 23
x = - 8 : 4 5b = - 25
x = - 2 b = - 25 : 5
b = - 5
Ответ: при b = (-5).