10x+21(x-2)=423

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Solution for 10x+21(x-2)=423 equation:


Simplifying
10x + 21(x + -2) = 423

Reorder the terms:
10x + 21(-2 + x) = 423
10x + (-2 * 21 + x * 21) = 423
10x + (-42 + 21x) = 423

Reorder the terms:
-42 + 10x + 21x = 423

Combine like terms: 10x + 21x = 31x
-42 + 31x = 423

Solving
-42 + 31x = 423

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 + 31x = 423 + 42

Combine like terms: -42 + 42 = 0
0 + 31x = 423 + 42
31x = 423 + 42

Combine like terms: 423 + 42 = 465
31x = 465

Divide each side by '31'.
x = 15

Simplifying
x = 15

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