Question

số a thoã mãn

\(\frac{a}{3}=\frac{2a+2}{5}\)

Answer 1

\(\frac{a}{3}=\frac{2a+2}{5}\)

\(\Rightarrow5a=3.\left(2a+2\right)\)

\(\Rightarrow5a=6a+6\)

\(\Rightarrow5a-6a=6\)

\(\Rightarrow a=-6\)

Answer 2

\(\frac{a}{3}=\frac{2a+2}{5}\Rightarrow5a=3\left(2a+2\right)\Rightarrow5a=6a+10\Rightarrow a=6\)

Answer 3

sory mk giải nhầm

\(\frac{a}{3}=\frac{2a+2}{5}\Rightarrow\frac{5a}{15}=\frac{6a+6}{15}\Rightarrow5a=6a+6\Rightarrow6=5a-6a\Rightarrow a=-6\)

Vậy a=-6