Solve.
{d+e=2d−e=4
use the substitution method.

there are an infinite number of solutions.
there is no solution.
the solution is (3, −1).
the solution is (5, 1).

Option  C is correct.

The solution is (3, -1)

Step-by-step explanation:

Substitution

Given the system of equation:

                           ......[1]

                            ......[2]

We can write equation [2] as;

d = e +4       ....[3]

Using substitution method;

Substitute the value of d in equation [1] we have;

Combine like terms;

Subtract 4 from both sides, we get

2e = -2

Divide both sides by 2 we get;

e = -1

Substitute the value of e = -1 in [1] we have;

d +(-1) = 2

d -1 = 2

Add 1 to both sides of an equation;

d = 3

Therefore, the solution for the given system of equation is, (3, -1)

step-by-step explanation:

a'(12.5,11.25)

slope=(y1-y2)/(x1-x2)