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Using FOIL (First, Outside, Inside, Last), we get:F: x²O: -3xI: 7xL: -21Adding these together gives x² + (-3x) + 7x + (-21)Which is the same as x² - 3x + 7x - 21Which simp...

-Take the second equation and divide all terms by 3.-This gives us two equations set up as "y = mx+C" -Make the equations equal to each other as Y = Y at the point of intersection.-Solve from he...

Step 1) 2x + y = 18 (a) Step 2) x - y = 6 (b) Step 3) using (a): y = 18 - 2x (c) Step 4) using (b): y = x - 6 (d) Step 5) Combine (c) and (d): 18 - 2x = x - 6 (e) Step 6) Rearange (e) to find x: 3x = 24 -...

FactoriseFactorise FullyExpandSimplifyExpand and Simplify

if x and y are in a ratio 3:2 you can write it as 3x=2y so if you are given a value for either you substitute it into this and rearange to get the other value. e.g y = 2 what is x? 3x=2(2) so 4=3x, x=3/4....