(-30(-7)-(210)(-3))=

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Solution for (-30(-7)-(210)(-3))= equation: 


Simplifying
(-30(-7) + -1(210)(-3)) = 0

Multiply -30 * -7
(210 + -1(210)(-3)) = 0

Multiply -1 * 210
(210 + -210 * -3) = 0

Multiply -210 * -3
(210 + 630) = 0

Combine like terms: 210 + 630 = 840
(840) = 0
840 = 0

Solving
840 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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