Đáp án:
Giải thích các bước giải:
$\text {Bài 1:}$
$\text { 5,23-(4,6-x)= 0,97}$
$\text { 4,6-x= 5,23-0,97}$
$\text { 4,6-x= 4,26}$
$\text {x= 4,6-4,26}$
$\text {x= 0,34}$
$\text {1,2-x+0,7= 0,95}$
$\text {1,2-x= 0,95-0,7}$
$\text { 1,2-x= 0,25}$
$\text { x= 1,2-0,25}$
$\text {x= 0,95}$
$\text {Bài 2:}$
$\text {C1:78,43-25,6-19,28 }$
$\text {=52,83-19,28}$
$\text {=33,55}$
$\text {C2: 78,43-25,6-19,28}$
$\text {=78,43-(25,6+19,28}$
$\text {=78,43-44,88}$
$\text {=33,55}$
$\text {Cho mk xin ctlhn+1 cảm ơn+5 sao nha}$
$\text {Cảm ơn bn rất nhiều}$