6-9x=87-30x

Solution for 6-9x=87-30x equation:

Simplifying
6 + -9x = 87 + -30x

Solving
6 + -9x = 87 + -30x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '30x' to each side of the equation.
6 + -9x + 30x = 87 + -30x + 30x

Combine like terms: -9x + 30x = 21x
6 + 21x = 87 + -30x + 30x

Combine like terms: -30x + 30x = 0
6 + 21x = 87 + 0
6 + 21x = 87

Add '-6' to each side of the equation.
6 + -6 + 21x = 87 + -6

Combine like terms: 6 + -6 = 0
0 + 21x = 87 + -6
21x = 87 + -6

Combine like terms: 87 + -6 = 81
21x = 81

Divide each side by '21'.
x = 3.857142857

Simplifying
x = 3.857142857