7a-(3a-7)=19

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Solution for 7a-(3a-7)=19 equation:


Simplifying
7a + -1(3a + -7) = 19

Reorder the terms:
7a + -1(-7 + 3a) = 19
7a + (-7 * -1 + 3a * -1) = 19
7a + (7 + -3a) = 19

Reorder the terms:
7 + 7a + -3a = 19

Combine like terms: 7a + -3a = 4a
7 + 4a = 19

Solving
7 + 4a = 19

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + 4a = 19 + -7

Combine like terms: 7 + -7 = 0
0 + 4a = 19 + -7
4a = 19 + -7

Combine like terms: 19 + -7 = 12
4a = 12

Divide each side by '4'.
a = 3

Simplifying
a = 3

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