3a-(3a-7)=7

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Solution for 3a-(3a-7)=7 equation: 


Simplifying
3a + -1(3a + -7) = 7

Reorder the terms:
3a + -1(-7 + 3a) = 7
3a + (-7 * -1 + 3a * -1) = 7
3a + (7 + -3a) = 7

Reorder the terms:
7 + 3a + -3a = 7

Combine like terms: 3a + -3a = 0
7 + 0 = 7
7 = 7

Add '-7' to each side of the equation.
7 + -7 = 7 + -7

Combine like terms: 7 + -7 = 0
0 = 7 + -7

Combine like terms: 7 + -7 = 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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