Question

Tìm x, biết:

a) x + 657 = 1657

b) 4059 + x = 7876

c) x – 1245 = 6478

d) 6535 – x = 4725

Answer 1

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) \(6535-x=4725\)

\(\Rightarrow x=6535-4725\)

\(\Rightarrow x=1810\)

Answer 2

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) \(6535-x=4725\)

\(x=6535-4725\)

\(x=1810\)

Answer 3

`x+657 =1657`

`x=1657-657`

`x=1000`

`4059 +x= 7876`

`x=7876-4059`

`x=3817`

`x-1245 = 6478`

`x=6478 + 1245`

`x=7723`

`6535 -x=4725`

`x= 6535 - 4725`

`x=1810`

Answer 4

a, 1000

b, 3817

c,7723

d,1810

Answer 5

a 1000

b3817

c7723

d1810