exam Maths Puzzle Numerical Ability

Can someone help me solve this problem using the Substitution or Elimination Method?

y=5x+2 3x-y=-13

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exam Other Question

hello

how do i determine whether each system is independen, inconsisitend, or dependent:

2x + 2y = 8
x + y = 4

thank you!
simplify:

(2x^3 + 3x^2 + 2x +2) + (x + 1)