Question

[phan khánh huyền]

106-(x+7)=9                45-(x+10)=31

156-(x+61)=82             126-(x+32)=86

Answer 1

[『Kuroba ム Tsuki Ryoo ︵²ᵏ⁷』]

`#3107.101107`

\(106-\left(x+7\right)=9\\ \Rightarrow x+7=106-9\\ \Rightarrow x+7=97\\ \Rightarrow x=97-7\\ \Rightarrow x=90\)

Vậy, `x = 90`

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\(45-\left(x+10\right)=31\\ \Rightarrow x+10=45-31\\ \Rightarrow x+10=14\\ \Rightarrow x=14-10\\ \Rightarrow x=4\)

Vậy, `x = 4`

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\(156-\left(x+61\right)=82\\ \Rightarrow x+61=156-82\\ \Rightarrow x+61=74\\ \Rightarrow x=74-61\\ \Rightarrow x=13\)

Vậy, `x = 13`

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\(126-\left(x+32\right)=86\\ \Rightarrow x+32=126-86\\ \Rightarrow x+32=40\\ \Rightarrow x=40-32\\ \Rightarrow x=8\)

Vậy, `x = 8.`