exam Maths Puzzle Numerical Ability

How do you find an answer to the question:
3x+y=3
7x+2y=1

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exam Other Question

How do you divide a polynomial useing long division? The problem is 6a2 + 13ab + 6b2 + by 3a + 2b Please explain every step!!!! thank You!! (8-6i)/3i

(simplify)