How would you solve the equation -3x-4y=2 with x+2y=-2 using the systems of substitution

(2, - 2 )

Step-by-step explanation:

Given the 2 equations

- 3x - 4y = 2 → (1)

x + 2y = - 2 → (2)

Rearrange (2) expressing x in terms of y by subtracting 2y from both sides

x = - 2 - 2y → (3)

Substitute x = - 2 - 2y into (1)

- 3(- 2 - 2y) - 4y = 2 ← distribute parenthesis and simplify left side

6 + 6y - 4y = 2

2y + 6 = 2 ( subtract 6 from both sides )

2y = - 4 ( divide both sides by 2 )

y = - 2

Substitute y = - 2 into (3) for corresponding value of x

x = - 2 - 2(- 2) = - 2 + 4 = 2

solution is (2, - 2 )

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.

but which class are u may know that first