exam Maths Puzzle Numerical Ability

Solve the following by graphing:
2x - y = 4
2x - y = 6

Second problem
2x - 2y = 8
3x - 2y = 1

Third problem
3x - 6y = 9
x - 2y = 3

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exam Other Question

how to factor a polynomial of the form ax2 + bx + c when a is not equal to 1. Describe both the grouping approach as well as reversing FOIL. Contrast the two methods by means of an The lengths of the sides of triangle ABC are AB=6, BC=4, and CA=5, then cos A=?