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What is 4p + 5q = - 18 and 3p - 10q = 69 using elimination
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What is 4p + 5q = - 18 and 3p - 10q = 69 using elimination

User Vasilis
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\left \{ {4p+5q=-18\ \atop {3p-10q=69}} \right. \\\\ \left \{ {{8p+10q=-36} \atop {3p-10q=69}} \right. \\+-----\\\\11p=33\ \ \ \ |:11\\p=3\\\\4\cdot3+5q=-18\\12+5q=-18\\5q=-18-12\\5q=-30\ \ \ \ \ \ |:5\\q=-6\\\\ \left \{ {{p=3} \atop {q=-6}} \right.
User Nikunj Acharya
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