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We know that 17% is the same as 17/100 or 0.17 so we do 0.17*84 = 14.28.
A typical GCSE question will give you an equation in the from ax2 + bx + c, x2 - 8x + 15 = 0 for example, and ask you to solve the possible value of X. To do this we need to split th...
There are various ways to solve simultaneous equations. The two easiest are by elimiation and by substitution. By Elimation When solving by elimination you want to ensure that you ...
For all straight line equations as the one above, the equation is y=mx+c where: m is the gradient, c is the y-intercept. Thus from the arrangement of the given equation, gradient ...
a + 3b = 12, a = 12 - 3b
3(12-3b) + b = 20
36-9b + b = 20
36-8b = 20
8b = 16
b = 2
2a + 12 = 24
2a = 12
a = 6
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