210-(-630)=x

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Solution for 210-(-630)=x equation:


Simplifying
210 + -1(-630) = x

Multiply -1 * -630
210 + 630 = x

Combine like terms: 210 + 630 = 840
840 = x

Solving
840 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
840 + -1x = x + -1x

Combine like terms: x + -1x = 0
840 + -1x = 0

Add '-840' to each side of the equation.
840 + -840 + -1x = 0 + -840

Combine like terms: 840 + -840 = 0
0 + -1x = 0 + -840
-1x = 0 + -840

Combine like terms: 0 + -840 = -840
-1x = -840

Divide each side by '-1'.
x = 840

Simplifying
x = 840

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