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solve the simultaneous equations, anyone help please?!

solve the simultaneous equations, anyone help please?!

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can anyone help me work these out please?
westendwannabe
16 January 2012
p+q=3
westendwannabe
16 January 2012
and
westendwannabe
16 January 2012
3p+q=11
westendwannabe
16 January 2012
p=4
pttx
16 January 2012
2p=8
pttx
16 January 2012
(equation 1- equation 2)
pttx
16 January 2012
substitute p=4 into equation 2 gives q=-1
pttx
16 January 2012
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