We have looked at how to solve equations with one unknown value, but what happens when there are two unknown values? An equation with two unknown values will have infinitely many solutions. or \(x=100 ...

An equation is a mathematical expression that contains an equals symbol. Equations often contain algebra. Algebra is used in Maths when we do not know the exact number in a calculation - this unknown ...

Gift 5 articles to anyone you choose each month when you subscribe. When Janette Sadik-Khan rose to be transport commissioner of New York City in 2007, she inherited one of the worst traffic problems ...

Chess, card games, and pickleball are just some of the games that can help keep your brain healthy and stimulated. Brain health is a vital part of overall well-being as we age. Research suggests the ...

November 24, 2025 • Our annual reading guide returns with 380+ new titles handpicked by NPR staff and trusted critics. Find 13 years of recommendations all in one place — that's more than 4,000 great ...