Question

[Phạm Ngọc Khánh]

a) (314 - x)-42=0

b) 540 + (345-x)=740

c) (x - 72) : 36=418

d)2010 * (x-14)=0

e) (x-2)*(x-4)=0

f) 114-(x-47)=0

g) 7272 : (120x -91)=12

Answer 1

[Despacito]

a) \(\left(314-x\right)-42=0\)

\(314-x=42\)

\(x=272\)

vay \(x=272\)

b) \(540+\left(345-x\right)=740\)

\(345-x=200\)

\(x=145\)

vay \(x=145\)

c) \(\left(x-72\right):36=418\)

\(x-72=15048\)

\(x=15120\)

vay \(x=15120\)

d) \(2010\left(x-14\right)=0\)

\(x-14=0\)

\(x=14\)

vay \(x=14\)

e) \(\left(x-2\right)\left(x-4\right)=0\)

\(\Rightarrow\orbr{\begin{cases}x-2=0\\x-4=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=2\\x=4\end{cases}}\)

vay \(\orbr{\begin{cases}x=2\\x=4\end{cases}}\)

f) \(114-\left(x-47\right)=0\)

\(x-47=114\)

\(x=161\)

vay \(x=161\)

g) \(7272:\left(120x-91\right)=12\)

\(120x-91=606\)

\(120x=697\)

\(x=\frac{697}{120}\)

vay \(x=\frac{697}{120}\)

Answer 2

[soobin hoang son]

Despacito đã có dấu'' x= '' thì ko cần kết luận là '' vậy''