Solve each of the following systems of equations by the method of cross-multiplication:
Method of cross multiplication
a1x + b1y + c1 = 0
a2x + b2y + c2 = 0
Given, 
⇒ x = m + n and y = m – n
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Solve each of the following systems of equations by the method of cross-multiplication:
Method of cross multiplication
a1x + b1y + c1 = 0
a2x + b2y + c2 = 0
Given,
⇒ x = m + n and y = m – n