Câu hỏi của Hiddleston. Tom

Question

Tìm x, biết:

a) x + 657 = 1657

b) 4059 + x = 7876

c) x – 1245 = 6478

d) 6535 – x = 4725

HT.Phong (9A5) · Accepted Answer

a) $x+657=1657$$\Rightarrow x=1657-657$$\Rightarrow x=1000$b) $4059+x=7876$$\Rightarrow x=7876-4059$$\Rightarrow x=3817$c) $x-1245=6478$$\Rightarrow x=6478+1245$$\Rightarrow x=7723$d) $6535-x=4725$$\Rightarrow x=6535-4725$$\Rightarrow x=1810$Câu trả lời: a) $x+657=1657$$\Rightarrow x=1657-657$$\Rightarrow x=1000$b) $4059+x=7876$$\Rightarrow x=7876-4059$$\Rightarrow x=3817$c) $x-1245=6478$$\Rightarrow x=6478+1245$$\Rightarrow x=7723$d) $6535-x=4725$$\Rightarrow x=6535-4725$$\Rightarrow x=1810$

Nguyễn Xuân Thành · Answer

a) $x+657=1657$

$x=1657-657$

$x=1000$

b) $4059+x=7876$

$x=7876-4059$

$x=3781$

c) $x-1245=6478$

$x=6478+1245$

$x=7723$

d) $6535-x=4725$

$x=6535-4725$

$x=1810$Câu trả lời: a) $x+657=1657$