Question

Tìm x: 2x+1=7-x

Answer 1

2x + 1 = 7 - x

2x + 1 - 7 + x =0

3x - 6 =0

3x = 6

=> x=2

Answer 2

2x+1=7-x

\(\Rightarrow\) 2x+x=-1+7

3x=6

x=6:3

x=2

Answer 3

2x + 1 = 7 - x

2x + 1 - 7 + x = 0

3x - 6 = 0

3x = 6

x = 2

Answer 4

=>2x+x=7-1

=>3x=6

=>x=2

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