Question

2r/5+7r/15= rewrite the expression by collecting like terms

Answer 1

2r/5+7r/15=
LCM=15
(15\5=3*2r=6r)
15\15=1*7r=7r
answer=6r+7r\15
answer=13r\15

Answer 2

$\frac{2r}{5} + \frac{7r}{15} --\ \textgreater \ \frac{2r}{5} * \frac{3}{3} = \frac{6r}{15} --\ \textgreater \ \frac{6r}{15} + \frac{7r}{15} --\ \textgreater \ \frac{6r + 7r}{15} = \frac{13r}{15}$