Solve these simultaneous equations to work out the correct values for x and y.
x - 2y = 6
5x + 4y = 100
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x- 2y =6_______1
5x+4y =100______2
multiply equation 1 by 5
5x-10y =30
subtract equation 1 from 2
5x+4y= 100
-5x-10y= 30
______
14y = 70
y = 70/14
y=5__________3
substitute equation 3 in 1
x-2y =6
x- 2(5)=6
x- 10=6
x=10-6
x=4
5x+4y =100______2
multiply equation 1 by 5
5x-10y =30
subtract equation 1 from 2
5x+4y= 100
-5x-10y= 30
______
14y = 70
y = 70/14
y=5__________3
substitute equation 3 in 1
x-2y =6
x- 2(5)=6
x- 10=6
x=10-6
x=4
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