khồng dám đâu mị còn pải học pài sao khó ghê mị còn pải học bài
\(\frac{2x+3}{6}=\frac{7x-3}{15}\)
⇔ 15( 2x + 3 ) = 6( 7x - 3 )
⇔ 30x + 45 = 42x - 18
⇔ 30x - 42x = -18 - 45
⇔ -12x = -63
⇔ x = 21/4
\(\frac{2x+3}{6}=\frac{7x-3}{15}\)
\(\Rightarrow\)(2x+3)15=(7x-3)6
\(\Leftrightarrow\)30x+45=42x-18
\(\Leftrightarrow\)45+18=42x-30x
\(\Leftrightarrow\)12x=53
\(\Leftrightarrow\)x=\(\frac{53}{12}\)
\(\frac{2x+3}{6}=\frac{7x-3}{15}\)
\(\left(2x+13\right)\cdot15=\left(7x-3\right)\cdot6\)
\(30x+45=42x-18\)
\(45+18=42x-30x\)
\(63=12x\)
\(12x=63\)
\(x=63:12\)
\(x=\frac{21}{4}\)
\(\frac{2x+3}{6}=\frac{7x-3}{15}\)
\(\Leftrightarrow30x+45=42x-18\Leftrightarrow-12x=-63\Leftrightarrow x=\frac{21}{4}\)
