What is
-3x+3y=6
3x+5y=-46

x = -7 , y = -5

Step-by-step explanation:

Solve the following system:

{3 y - 3 x = 6 | (equation 1)

3 x + 5 y = -46 | (equation 2)

Add equation 1 to equation 2:

{-(3 x) + 3 y = 6 | (equation 1)

0 x+8 y = -40 | (equation 2)

Divide equation 1 by 3:

{-x + y = 2 | (equation 1)

0 x+8 y = -40 | (equation 2)

Divide equation 2 by 8:

{-x + y = 2 | (equation 1)

0 x+y = -5 | (equation 2)

Subtract equation 2 from equation 1:

{-x+0 y = 7 | (equation 1)

0 x+y = -5 | (equation 2)

Multiply equation 1 by -1:

{x+0 y = -7 | (equation 1)

0 x+y = -5 | (equation 2)

Collect results:

{x = -7 , y = -5

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.