\(a,\dfrac{x}{6}=\dfrac{-1}{2}\\ x=\dfrac{6\cdot-1}{2}\\ \Rightarrow x=-3\)
\(b,\dfrac{x}{10}=\dfrac{3}{15}\\ x=\dfrac{10\cdot3}{15}\\ \Rightarrow x=2\)
\(c,\dfrac{2x}{49}=\dfrac{-2}{7}\\ 2x=\dfrac{49\cdot-2}{7}\\ 2x=-14\\ x=-14:2\\ \Rightarrow x=-7\)
\(d,\dfrac{3x}{32}=\dfrac{-3}{8}=\\ 3x=\dfrac{32\cdot-3}{8}\\ 3x=-12\\ x=12:\left(-3\right)\\ \Rightarrow x=-4\)
\(e,\dfrac{x+5}{9}=\dfrac{14}{18}\\ x+5=\dfrac{9\cdot14}{18}\\ x+5=7\\ x=7-5\\ \Rightarrow x=2\)
\(f,\dfrac{2x-1}{15}=\dfrac{3}{5}\\ 2x-1=\dfrac{15\cdot3}{5}\\ 2x-1=9\\ 2x=9+1\\ 2x=10\\ x=10:2\\ \Rightarrow x=5\)
a) \(\dfrac{x}{6}=\dfrac{-1}{2}\)
⇔ \(2x=-6\)
⇒ \(x=-3\)
b) \(\dfrac{x}{10}=\dfrac{3}{15}\)
⇔ \(15x=30\)
⇒ \(x=2\)
a: =>x=-6:2=-3
b: =>x/10=1/5
hay x=2
c: =>2x=-14
hay x=-7
d: =>3x=-12
hay x=-4
e: =>x+5=7
hay x=2
f: =>2x-1=9
hay x=5
g: =>8x=4x+4
=>4x=4
hay x=1
h: =>10x+30=12x-12
=>-2x=-42
hay x=21
