3. Which of the following equations shows how substitution can be used to solve the following system of equations? y=23 - 1
13x + 2y - 19
3x + 2y = 2x - 1
3(2x - 1) + 2y = 19
3x + 2(2x - 1) - 19

3x + 2(2x-1)=19

C

Step-by-step explanation: substitution is basically replacing variables by what they equal, so if Y is 2x - 1 then in ypur answer the equation is replaced by Y by that equation, so the answer would be 3x + 2(2x-1)=19. Lemme know if that makes sense…

details

step-by-step explanation:

a: 1/6, j: 1/4

step-by-step explanation: you are welcome