21x+12(3x-200)=1590

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Solution for 21x+12(3x-200)=1590 equation:


Simplifying
21x + 12(3x + -200) = 1590

Reorder the terms:
21x + 12(-200 + 3x) = 1590
21x + (-200 * 12 + 3x * 12) = 1590
21x + (-2400 + 36x) = 1590

Reorder the terms:
-2400 + 21x + 36x = 1590

Combine like terms: 21x + 36x = 57x
-2400 + 57x = 1590

Solving
-2400 + 57x = 1590

Solving for variable 'x'.

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

Add '2400' to each side of the equation.
-2400 + 2400 + 57x = 1590 + 2400

Combine like terms: -2400 + 2400 = 0
0 + 57x = 1590 + 2400
57x = 1590 + 2400

Combine like terms: 1590 + 2400 = 3990
57x = 3990

Divide each side by '57'.
x = 70

Simplifying
x = 70

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