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

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


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

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

Multiply 210 * -3
0 = 210 + -1(-630)

Multiply -1 * -630
0 = 210 + 630

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

Solving
0 = 840

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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