A set of equations is given below:

Equation S: y = x + 9

Equation T: y = 2x + 1

Which of the following steps can be used to find the solution to the set of equations?

x = 2x + 1

x + 9 = 2x

x + 1 = 2x + 9

x + 9 = 2x + 1

Solve each solution by substitution. y=-x^2-2x+8 y=x^2-8x-12

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