Question

Solve.

Answer 1

Answer:

Option  C is correct.

The solution is (3, -1)

Step-by-step explanation:

Substitution

Given the system of equation:

$d+e = 2$                            ......[1]

$d-e = 4$                             ......[2]

We can write equation [2] as;

d = e +4       ....[3]

Using substitution method;

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

$e+4+e = 2$

Combine like terms;

$2e +4 = 2$

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)