3(x+2)-(a-1)=17

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Solution for 3(x+2)-(a-1)=17 equation:


Simplifying
3(x + 2) + -1(a + -1) = 17

Reorder the terms:
3(2 + x) + -1(a + -1) = 17
(2 * 3 + x * 3) + -1(a + -1) = 17
(6 + 3x) + -1(a + -1) = 17

Reorder the terms:
6 + 3x + -1(-1 + a) = 17
6 + 3x + (-1 * -1 + a * -1) = 17
6 + 3x + (1 + -1a) = 17

Reorder the terms:
6 + 1 + -1a + 3x = 17

Combine like terms: 6 + 1 = 7
7 + -1a + 3x = 17

Solving
7 + -1a + 3x = 17

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 + -1a + -7 + 3x = 17 + -7

Reorder the terms:
7 + -7 + -1a + 3x = 17 + -7

Combine like terms: 7 + -7 = 0
0 + -1a + 3x = 17 + -7
-1a + 3x = 17 + -7

Combine like terms: 17 + -7 = 10
-1a + 3x = 10

Add '-3x' to each side of the equation.
-1a + 3x + -3x = 10 + -3x

Combine like terms: 3x + -3x = 0
-1a + 0 = 10 + -3x
-1a = 10 + -3x

Divide each side by '-1'.
a = -10 + 3x

Simplifying
a = -10 + 3x

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