Question

Tìm x

4.(x-3)+5=2x+1

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Answer 1

\(4\left(x-3\right)+5=2x+1\)

\(4x-12+5=2x+1\)

\(4x-2x=1-5+12\)

\(2x=8\)

\(x=4\)

vay \(x=4\)

Answer 2

4.(x-3)+5=2x+1

\(\Rightarrow\)4x-12+5=2x+1

\(\Rightarrow\)4x-12=2x+1-5

\(\Rightarrow\)4x-12=2x+(-4)

\(\Rightarrow\)4x=2x+(-4)+12

\(\Rightarrow\)4x=2x+8

\(\Rightarrow\)4x-2x=8

\(\Rightarrow\)2x=8

\(\Rightarrow\) x=4

Answer 3

4.(x-3)+5=2x+1

⇒4x-12+5=2x+1

⇒4x-12=2x+1-5

⇒4x-12=2x+(-4)

⇒4x=2x+(-4)+12

⇒4x=2x+8

⇒4x-2x=8

⇒2x=8

⇒ x=4

Answer 4

4.(x-3)+5=2x+1

4.x-4.3+5=2x+1

(4.x-2x)-4.3+5=1

2x-4.3+5=1

2x-12+5=1

2x-12=1-5

2x-12=-4

2x=-4+12

2x=16

x=16:2

x=8