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A bag in a sale is reduced by 20%. It now costs £40. What was the original price? Solution 1: Using ratios and basic percentagesA good way to solve this problem is by thinking about what percentage is lef...
Method 1: Foil method (each term of the first bracket are multiplied by each term of the second bracket, and hence the product have 4 terms before simplifying)(2x-1)(x+3) = 2xx + 2x3 - 1x -1<...
Simultaneous equations are a set of equations that have multiple common unknown variables such as two equations which both contain the unknowns x and y. To solve a simultaneous equation the trick is to ch...
Los fines de semana, suelo ir al cine con unos amigos. La semana pasada vimos 'Los Increíbles 2', que me encantó, y este fin de semana vamos a ver la segunda 'Mamma Mia'. El domingo es el cumpleaños de mi...
Pour la plupart, l’internet a amélioré nos vies. Tandis que l’introduction d’internet a apporté beaucoup d’avantages, malheureusement, cela a produit quelques problèmes assez graves. Qui plus est, ces inc...
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