Solve, using the substitution method.
y – 2x = 8
16 + 4x = 2y
a.
the only solution is (24, 0).
b.
there are an infinite number of solutions.
c.
the only solution is (1, 10).
d.
there is no solution.

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.

hello :

by applying the distributive property :

6 × 4.3 = 6 × ( 4 + 0.3 )

            =   (6 ×   4) + (6 ×   0.3)

            = 24 + 1.8

6 × 4.3 = 25.8