Answer:
Why the equation (3x + 4) + 4 = (5x - 4) + 4 also has the solution set {4}.
It´s because 4 is the only value that satisfies the statement.
Step-by-step explanation:
As you can see the terms in parentheses on both sides of the equation are added to 4.
(3x + 4) + 4 = (5x - 4) + 4
So we can set the equation as.
3x + 4 = 5x - 4
Subtract 3x on both sides of equation.
4 = 2x - 4
Add 4 on both sides of equation.
8 = 2x
Divide both sides of equation by 2.
4 = x
4 is the only value that satisfies the statement.
