7*-9+2*-9-4*-9=-45

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Solution for 7*-9+2*-9-4*-9=-45 equation: 


Simplifying
7 * -9 + 2 * -9 + -4 * -9 = -45

Multiply 7 * -9
-63 + 2 * -9 + -4 * -9 = -45

Multiply 2 * -9
-63 + -18 + -4 * -9 = -45

Multiply -4 * -9
-63 + -18 + 36 = -45

Combine like terms: -63 + -18 = -81
-81 + 36 = -45

Combine like terms: -81 + 36 = -45
-45 = -45

Add '45' to each side of the equation.
-45 + 45 = -45 + 45

Combine like terms: -45 + 45 = 0
0 = -45 + 45

Combine like terms: -45 + 45 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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