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Take away 3 from both sides to give you : 5x = 15Divide by 5 on both sides to give you : x = 3

To solve this, you need to find two factors of -15 that total to give -2. The solution we're looking for is of the for (x + something) (x + something)=0, as you can then solve each bracket to get two resu...

From our base right angled triangle (base and height of 1) and remembering SOH CAH TOA ( tangent = opposite/adjacent), we can deduce tan(45) = 1 / 1 = 1

Find the highest common factor of each component. H.c.f. of 4 and 10 is 2, so:4x² + 10x = 2(2x² + 5x)H.c.f of x² and x is simply x, so:2( 2x² + 5x) = 2x(2x + 5...

The probability that a girl chosen at random studies french is 3/5. This means that out of 700 girls at the school, three fifths (3/5) girls study french. To find out how many girls study french we must f...