4(5-9)=(4*5)-(4*9)

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Solution for 4(5-9)=(4*5)-(4*9) equation: 


Simplifying
4(5 + -9) = (4 * 5) + -1(4 * 9)

Combine like terms: 5 + -9 = -4
4(-4) = (4 * 5) + -1(4 * 9)

Multiply 4 * -4
-16 = (4 * 5) + -1(4 * 9)

Multiply 4 * 5
-16 = (20) + -1(4 * 9)
-16 = 20 + -1(4 * 9)

Multiply 4 * 9
-16 = 20 + -1(36)

Multiply -1 * 36
-16 = 20 + -36

Combine like terms: 20 + -36 = -16
-16 = -16

Add '16' to each side of the equation.
-16 + 16 = -16 + 16

Combine like terms: -16 + 16 = 0
0 = -16 + 16

Combine like terms: -16 + 16 = 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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