(x-3)+(9x)=400

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Solution for (x-3)+(9x)=400 equation:


Simplifying
(x + -3) + (9x) = 400

Reorder the terms:
(-3 + x) + (9x) = 400

Remove parenthesis around (-3 + x)
-3 + x + (9x) = 400

Combine like terms: x + (9x) = 10x
-3 + 10x = 400

Solving
-3 + 10x = 400

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 10x = 400 + 3

Combine like terms: -3 + 3 = 0
0 + 10x = 400 + 3
10x = 400 + 3

Combine like terms: 400 + 3 = 403
10x = 403

Divide each side by '10'.
x = 40.3

Simplifying
x = 40.3

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