exam Maths Puzzle Numerical Ability

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square root of x + 2 = the square root of x +12

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exam Other Question

Could someone PLEASE show me the graphs for these equations? I have several questions like them, and it would help me a great deal! Thank you!
(a) 2
(b) 1/2
(c) -2
(d) -1/2
Solve each of the following systems by graphing.

1. 2x – y = 4
2x – y = 6