![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
The sentence is twice r plus three times s identical to thirteen.
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The word “twice “ indicates multiplication by 2. So, twice r = 2r \ \
\The word “plus” indicates the symbol “ + ”
\The word “times” indicates multiplication. So, three times s = 3s \ \
\The word “identical” can be represented as “=” symbol.![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
Rewrite the sentence into expression as, \ \
\![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=39f567d48805c016062b84aa06407e20.png\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The equation is 2r + 3s = 13
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