Answer:
*In Explanation
Step-by-step explanation:
1) Start by just substituting the value of x (given in equation 1) into the second equation:
y = 3x - 1
y = 3(2) - 1
y = 6-1 = 5
2) Since both equations have x on one side, make both equations equal to one another:
2y + 4 = 9 - 3y
Solve for y:
5y = 5
y = 1
Plug y = 1 into either one of the given equations and solve for x:
I'll use first equation:
x = 2y + 4
x = 2(1) + 4
x = 6
3) When substituting X into the second equation, remember to use parenthesis:
The student was substituting x from equation 1 into equation 2, but they forgot to multiply ALL of 2y + 3 by 2.
x = 2y + 3
Substitute into 2nd eqn:
y = 2(2y + 3) - 9
