Just q1 ! give an explanation : -)

Y = 2x 
2y + x = 5

Use Substitution Method

2(2x) + x = 5

4x + x = 5

5x = 5

x = 5

Now plug in X into either of the equation.

y = 2x

y = 2(5)

y = 10

Answer;

(5,10)

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