Question

2.(x-51)-22=20

Answer 1

\(2\left(x-51\right)-22=20.\)

\(2\left(x-51\right)=20+22.\)

\(2\left(x-51\right)=42.\)

\(x-51=42:2.\)

\(x-51=21.\)

\(x=21+51.\)

\(x=72.\)

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Answer 2

\(2(x-51)-22=20\)

\(2x-102=20+22\)

\(2x-102=42\)

\(2x=144\)

\(x=72\)

Answer 3

2 (x -51)-22 =20 (2 x -2 ·51)-22=20 (2 x -102)-22=20 Kết quả: X=72

Answer 4

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