15x+21(x-2)=318

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Solution for 15x+21(x-2)=318 equation:


Simplifying
15x + 21(x + -2) = 318

Reorder the terms:
15x + 21(-2 + x) = 318
15x + (-2 * 21 + x * 21) = 318
15x + (-42 + 21x) = 318

Reorder the terms:
-42 + 15x + 21x = 318

Combine like terms: 15x + 21x = 36x
-42 + 36x = 318

Solving
-42 + 36x = 318

Solving for variable 'x'.

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

Add '42' to each side of the equation.
-42 + 42 + 36x = 318 + 42

Combine like terms: -42 + 42 = 0
0 + 36x = 318 + 42
36x = 318 + 42

Combine like terms: 318 + 42 = 360
36x = 360

Divide each side by '36'.
x = 10

Simplifying
x = 10

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