Bài1:
a, -32 – ( x-4) =0
b, 4 – ( 15 – x ) =7
c, 10 – x = 32 – (17-7)
Bài1: a, -32 – ( x-4) =0 b, 4 – ( 15 – x ) =7 c, 10 – x = 32 – (17-7)
By Cora
By Cora
Bài1:
a, -32 – ( x-4) =0
b, 4 – ( 15 – x ) =7
c, 10 – x = 32 – (17-7)
Đáp án: $\begin{array}{l} a)-28\\b)+18\\c)-12\end{array}$
Giải thích:
$\begin{array}{l}a)(-32)-(x-4)=0\\x-4=(-32)-0\\x=(-32)+4\\x=-28\\b)4-(15-x)=7\\15-x=4-7\\x=15-(-3)\\x=18\\c)10-x=32-(17-7)\\10-x=22\\x=10-22\\x=-12\end{array}$
Giải thích các bước giải:
a, -32 – ( x-4) =0
⇔−32−x+4=0
⇔−x−28=0
⇔−x=28
⇔x=−28
b, 4 – ( 15 – x ) =7
⇔4−15+x=7
⇔x−11=7
⇔x=7+11
⇔x=18
c, 10 – x = 32 – (17-7)
⇔10−x=32−17+7
⇔10−x=15+7
⇔10−x=22
⇔−x=22−10
⇔−x=12
⇔x=−12
xin hay nhất! :)))