7(a-3)-(2a+1)=a-2(4a+8)

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Solution for 7(a-3)-(2a+1)=a-2(4a+8) equation:


Simplifying
7(a + -3) + -1(2a + 1) = a + -2(4a + 8)

Reorder the terms:
7(-3 + a) + -1(2a + 1) = a + -2(4a + 8)
(-3 * 7 + a * 7) + -1(2a + 1) = a + -2(4a + 8)
(-21 + 7a) + -1(2a + 1) = a + -2(4a + 8)

Reorder the terms:
-21 + 7a + -1(1 + 2a) = a + -2(4a + 8)
-21 + 7a + (1 * -1 + 2a * -1) = a + -2(4a + 8)
-21 + 7a + (-1 + -2a) = a + -2(4a + 8)

Reorder the terms:
-21 + -1 + 7a + -2a = a + -2(4a + 8)

Combine like terms: -21 + -1 = -22
-22 + 7a + -2a = a + -2(4a + 8)

Combine like terms: 7a + -2a = 5a
-22 + 5a = a + -2(4a + 8)

Reorder the terms:
-22 + 5a = a + -2(8 + 4a)
-22 + 5a = a + (8 * -2 + 4a * -2)
-22 + 5a = a + (-16 + -8a)

Reorder the terms:
-22 + 5a = -16 + a + -8a

Combine like terms: a + -8a = -7a
-22 + 5a = -16 + -7a

Solving
-22 + 5a = -16 + -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
-22 + 5a + 7a = -16 + -7a + 7a

Combine like terms: 5a + 7a = 12a
-22 + 12a = -16 + -7a + 7a

Combine like terms: -7a + 7a = 0
-22 + 12a = -16 + 0
-22 + 12a = -16

Add '22' to each side of the equation.
-22 + 22 + 12a = -16 + 22

Combine like terms: -22 + 22 = 0
0 + 12a = -16 + 22
12a = -16 + 22

Combine like terms: -16 + 22 = 6
12a = 6

Divide each side by '12'.
a = 0.5

Simplifying
a = 0.5

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