7x+3(-x+6)=42 Show all steps and properties used
Mathematics · High School · Mon Jan 18 2021
Answered on
Given the numerical equation:
7x + 3(-x + 6) = 42
Solve for x.
Solution:
In order to solve for x, we simply need to distribute first 3 to each value inside the parenthesis.
7x + 3(-x + 6) = 42
7x - 3x + 18 = 42
4x + 8 = 42
Transpose 8 on the other side of the equation, hence we must take note that in transposing numbers, the sign changes.
4x = 42 - 8
4x = 34
Divide both sides by 4 in order to get the value of x.
4x/4 = 34/4
x = 34/4 or 8.5
Final answer:
x = 34/4 or 8.5