Question

Giai bat pt

3x-5<hoac bang x+1

B 2x-2phan3>2-x+2phan2

 

Answer 1

a) \(3x-5\le x+1\)

\(\Leftrightarrow3x-x\le1+5\)

\(\Leftrightarrow2x\le6\)

\(\Leftrightarrow x\le3\)

Vậy.............

b) \(\frac{2x-2}{2}>\frac{2-x+2}{3}\)

\(\Leftrightarrow3\left(2x-2\right)>2\left(2-x+2\right)\)

\(\Leftrightarrow6x-6>4-2x+4\)

\(\Leftrightarrow6x+2x>4+4+6\)

\(\Leftrightarrow8x>14\)

\(\Leftrightarrow x>\frac{7}{4}\)

Vậy..................

Answer 2

a,\(3x-5\le x+1\Leftrightarrow2x\le6\Leftrightarrow x\le3\)

b,\(\frac{2x-2}{3}>2-\frac{x+2}{2}\)

\(\Leftrightarrow2\left(2x-2\right)>12-3\left(x+2\right)\)

\(\Leftrightarrow4x-4>12-3x-6\)

\(\Leftrightarrow7x>10\Leftrightarrow x>\frac{10}{7}\)

Answer 3

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