4. Look at the system of equations.
y = 2x - 1
4x + y = 2

Which shows a correct step in using substitution to solve the system of equations?
A. 4x + y = 2x - 1
B. 4x + 2x - 1 = 2
C. 6x - 2 = y.
D. 6x + 2 = 2y

B. 4x + 2x - 1 = 2

Step-by-step explanation:

Option B shows a correct step in using substitution to solve the system of equations.

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72