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2 Answers By Expert Tutors ... Let's set x = cost of books and y = cost of pens. ... In algebra, this can be written as x + y = 18. ... Using x and y, we get 1 book and 2 pens costs $21, or x + 2y = 21 ... The pen must cost $3 because we are adding $3 to the total when we ... Please provide a valid phone number.
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An algebraic equation
Step-by-step explanation:
This type of equation in the form of a mathematical statement. Thistwo equal has equal expressions. So 20p-35=85 is an algebraic equation because when we find the value of p then 20p-35 will be equal to 85.
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The mathematical sciences are a group of areas of study that includes mathematics.
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