4 (x + 9) = 20 idk math
Mathematics · Middle School · Tue Nov 03 2020
Answered on
Given the numerical expression:
4(x + 9) = 20
Solution:
In order to simplify the numerical expression, distribute first 4 on each value inside the parenthesis.
4(x + 9) = 20
4x + 36 = 20
Transpose 20 on the other side of the equation. Note that when transposing a number, the sign changes.
4x + 36 - 20 = 0
Simplified answer: 4x + 16
In order to find the value of x, transpose 16 on the other side of the equation, and divide both sides by 4, to cancel out 4x.
4x + 16
4x = -16
x = -4
The value of x is -4.