Fiona was thinking of a number. Fiona doubles it and adds 5.1 to get an answer of 11.5.

Mathematics

1 answer:

telo118 [61]3 years ago

7 0

Answer:

Step-by-step explanation:

<h2>let X be the unknown number</h2><h2>X × 2 = 2x</h2><h2>2x + 5•1 = 11•5</h2><h2>2x = 11•5 - 5•1</h2><h2>2x = 6•4</h2><h2>divide both sides by 2</h2><h2>X = 3•2</h2>

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