solve for x. 7(x - 3) 3(4 - x) = -8 x = 1/4 x = 25/10 x = -16/19 x = -41/10
Mathematics · High School · Thu Feb 04 2021
Answered on
Given the equation:
7 (x - 3)
3(4 - x ) = 8
Solve for x.
Solution:
We can solve for x individually.
= 7 (x - 3)
Distribute 7 to each value inside the parenthesis.
= 7x -21
Transpose -21 to the other side of the equation, hence we must take note that in transposing a number, the sign changes.
7x = 21
Divide both sides by 7 in order to determine the value of x.
7x/7 = 21/7
x = 3
3 ( 4 - x ) = 8
Do the same process.
12 - 3x = 8
Transpose -3 and 8 to the opposite sides of the equation.
3x = 12 - 8
3x = 4
Divide both sides by 3 in order to cancel out 3x.
3x/3 = 4/3
x = 4/3
Final answer:
x = 3
x = 4/3