(21x-3)+(7x+9)+(15x+15)=180

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Solution for (21x-3)+(7x+9)+(15x+15)=180 equation:


Simplifying
(21x + -3) + (7x + 9) + (15x + 15) = 180

Reorder the terms:
(-3 + 21x) + (7x + 9) + (15x + 15) = 180

Remove parenthesis around (-3 + 21x)
-3 + 21x + (7x + 9) + (15x + 15) = 180

Reorder the terms:
-3 + 21x + (9 + 7x) + (15x + 15) = 180

Remove parenthesis around (9 + 7x)
-3 + 21x + 9 + 7x + (15x + 15) = 180

Reorder the terms:
-3 + 21x + 9 + 7x + (15 + 15x) = 180

Remove parenthesis around (15 + 15x)
-3 + 21x + 9 + 7x + 15 + 15x = 180

Reorder the terms:
-3 + 9 + 15 + 21x + 7x + 15x = 180

Combine like terms: -3 + 9 = 6
6 + 15 + 21x + 7x + 15x = 180

Combine like terms: 6 + 15 = 21
21 + 21x + 7x + 15x = 180

Combine like terms: 21x + 7x = 28x
21 + 28x + 15x = 180

Combine like terms: 28x + 15x = 43x
21 + 43x = 180

Solving
21 + 43x = 180

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 43x = 180 + -21

Combine like terms: 21 + -21 = 0
0 + 43x = 180 + -21
43x = 180 + -21

Combine like terms: 180 + -21 = 159
43x = 159

Divide each side by '43'.
x = 3.697674419

Simplifying
x = 3.697674419

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