The equation 3x + 4 = 5x - 4 has the solution set {4}.
a. explain why the equation (3x + 4) + 4 = (5x - 4) + 4 also has the solution set {4}.

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.

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step-by-step explanation: 6870

1857 times .63 equals 1169.91 subtract that from 1857 you get 687.09

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180