Engineering Mathematics

- Laws of Exponents and Radicals
- Logarithm and Other Important Properties in Algebra
- Quadratic Equations in One Variable
- Special Products and Factoring
- Arithmetic, geometric, and harmonic progressions
- Binomial Theorem
- System of Equations
- Variation / Proportional
- Verbal Problems in Algebra
- Probability and Statistics

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## Comments

## Question:

Question:

Why is the mathematical expression for ...when Albert is twice as old as Bryan was...

A + x = 2(B - y)

And not

A = 2(B - y) since "when Albert is" refers to the present?

## "When Albert is" refers to

"When Albert is" refers to the time when "Albert is as old as Bryan will be" (the previous statement) which is

xyrs in the future. Similar interpretation for "Bryan is as old as Albert was when Bryan was half the age he will be ten years from now"