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6x+4y=16, 6x+15y=-6 11y=-22 y=-2 3x=8+4=12 x=4 x=4, y=-2

First we need to multiply out the bracket 7k-21=3k-5 Then we must make sure our variable is only on one side so we need to deduct 3k from both sides 4k-21=-5 Now we should isolate our variable so add 21 to b...

First think how you would solve this if it was simply an '=' sign instead of a > Deduct 5 from both sides This would give us 6y>3 Divide both sides by 6 Think: because this is an inequality, is the val...

x 2 + y 2 = 36 (1) x = 2y + 6 (2) You can solve simulateous equations in three ways: Substitution, addition or subtraction. If one equation contains both x 2 and y 2 then you should use substitution as with ...

Simeltanous equations are a pair of equations that have 2 unknows. In order to solve a simelatneous equation 1 of the unknows must be eliminated. This can be done by either: 1. Substitution - This involves p...