Решить уравнения : x-(18+24)=29, (65-39)+b=81
X-(18+24)=29 x-42=29 x=42+29 x=71 (65-39)+b=81 26+b=81 b=81-26 b=55
X-42=29 x=42+29 x=71 (65-39)+b=81 26+b=81 b=81-26 b=55