Question

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​1.Tìm x.

a) (x - 35) - 120 = 0 b) 124 + (118 - x) = 217 c) 156 - (x + 61) =82
x - 35 =..... 118 - x =..... x + 61 =.....

x-35 =.... 118 - x =..... x + 61 =.....

x =..... x = ..... x =.....

x =..... x = ..... x =.....

Answer 1

[Nguyễn Thanh Hằng]

a/ \(\left(x-35\right)-120=0\)

\(\Leftrightarrow x-35=0+120\)

\(\Leftrightarrow x-35=120\)

\(\Leftrightarrow x=120+35\)

\(\Leftrightarrow x=155\)

Vậy ...

b/ \(124+\left(188-x\right)=217\)

\(\Leftrightarrow188-x=217-124\)

\(\Leftrightarrow188-x=93\)

\(\Leftrightarrow x=95\)

Vậy ...

b/ \(156-\left(x+61\right)=82\)

\(\Leftrightarrow x+61=74\)

\(\Leftrightarrow x=13\)

Vậy ..

Answer 2

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