Question

y= 3x + 1

y= 2x – 3

When using the method called substitution, the y coordinate of the solution to the system of equations shown above is:
A. 13
B. -13
C. 11
D. -11

Answers

  1. Answer:
    y= -11
    Step-by-step explanation:
    After rearranging equation 2, we get x= y+3/2
    Sub it into equation 1
    y= 3(y+3/2) + 1
    y= 3y+9/2 + 1
    y= 3y + 11 / 2
    2y = 3y + 11
    -y = 11
    y = -11

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  2. The answer is D. -11

    -3x+1=2x-3 (solve and you will get x= -4)

    Substitute x in one of the equations to solve for x

    y= 3(-4) + 1

    y= -11

    Reply

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