Answer:
Addition Property of Equality
Step-by-step explanation:
Given expression:
To find the missing justification.
We will evaluate the given expression and justify the step.
Using Addition Property of Equality( by this property of equality we can add a number to both sides of the equation without effecting the equality of the equation)
Adding 
to both sides of the equation.
I think it is D but i'm not positive hope this helps
Answer:
.
Step-by-step explanation:
The given function is 
.
We want to find a rule for 
.
Let 
.
Interchange x and y.
.
Solve for y.
.
Expand
.
Group y-terms
.
Factor
.
.
.
Answer:
x = 7; y = 77
Step-by-step explanation:
y = 9x + 14
y = 4x + 49
Since both equations are solved for y, set the two right sides equal and solve for x.
9x + 14 = 4x + 49
5x = 35
x = 7
Sow substitute 7 for x in the first equation and solve for y.
y = 9x + 14
y = 9(7) + 14
y = 63 + 14
y = 77
Answer: x = 7; y = 77
