\(\text{a) 461 + (x - 45) = 387}\)
\(\left(x-45\right)=\text{ }387-461\)
\(x-45=-74\)
\(x=-74+45\)
\(x=-29\)
Vậy \(x=-29\)
\(\text{b) 11 - (- 53 + x) = 97}\)
\(-53+x=11-97\)
\(-53+x=-108\)
\(x=-108-\left(-53\right)\)
\(x=-55\)
Vậy \(x=-55\)
\(\text{c) - (x + 84) + 213 = - 16}\)
\(-\left(x+84\right)=-16-213\)
\(-\left(x+84\right)=-229\)
<=> \(x+84=229\)
\(x=229-84\)
\(x=145\)
Vậy \(x=145\)
@Hy
Đúng 0
Bình luận (2)