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Fractions can be easily understood by thinking of how to split n numbers of pizzas between d people. Through this we see that everyone gets (n/d) pizzas

Rearrange to get either y or x as the subject of the equation and then solve the equation by doing this. This is called eliminating one variable (x or y) substitute the found value into either equation st...

-((3x+2)(1+sqrt(x)))/(1-x)

32x(4x^2 + 3)^3

4sinx(cosx)^3 - 4cosx(sinx)^3