Question

Equation 1: -4x + y = 6

Equation 2: -5x - y = 21

Which variable is easiest to solve for?

A.The easiest to solve for is x in the first equation.

B.The easiest to solve for is y in the first equation.

C.The easiest to solve for is x in the second equation.

D.The easiest to solve for is y in the second equation.

Answer 1

B. The easiest to solve for is Y in the first equation.

Explanation:

Since the y has no coefficient in both equations, we look at the steps we take to solve. Equation 2 has to make you multiply negative one by both sides to make y positive, and THEN you would have to subtract 5x from both sides. However, with the first equation, all we need to do to solve for Y is add 4x to both sides. The answer? B. The easiest to solve for is Y in the first equation.

Answer 2

B

Explanation:

y in equation 1, since you just

-4x + y = 6

add 4x to both sides to get

y = 4x + 6

while for the rest of the variables in both equations, you need at least two steps

Thus, the answer is B