Question

tìm x 
12x - 144 = 0
5x -32 :18 = 13 
3x + 6 = 15
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Answer 1

`Answer:`

\(12x-144=0\)

\(\Leftrightarrow12x=144\)

\(\Leftrightarrow x=144:12\)

\(\Leftrightarrow x=12\)

\(5x-32:18=13\)

\(\Leftrightarrow5x-\frac{16}{9}=13\)

\(\Leftrightarrow5x=13+\frac{16}{9}\)

\(\Leftrightarrow5x=\frac{133}{9}\)

\(\Leftrightarrow x=\frac{133}{9}:5\)

\(\Leftrightarrow x=\frac{133}{45}\)

\(3x+6=15\)

\(\Leftrightarrow3x=9\)

\(\Leftrightarrow x=3\)