13(3a-1)-5=7(2+5a)

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Solution for 13(3a-1)-5=7(2+5a) equation:


Simplifying
13(3a + -1) + -5 = 7(2 + 5a)

Reorder the terms:
13(-1 + 3a) + -5 = 7(2 + 5a)
(-1 * 13 + 3a * 13) + -5 = 7(2 + 5a)
(-13 + 39a) + -5 = 7(2 + 5a)

Reorder the terms:
-13 + -5 + 39a = 7(2 + 5a)

Combine like terms: -13 + -5 = -18
-18 + 39a = 7(2 + 5a)
-18 + 39a = (2 * 7 + 5a * 7)
-18 + 39a = (14 + 35a)

Solving
-18 + 39a = 14 + 35a

Solving for variable 'a'.

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

Add '-35a' to each side of the equation.
-18 + 39a + -35a = 14 + 35a + -35a

Combine like terms: 39a + -35a = 4a
-18 + 4a = 14 + 35a + -35a

Combine like terms: 35a + -35a = 0
-18 + 4a = 14 + 0
-18 + 4a = 14

Add '18' to each side of the equation.
-18 + 18 + 4a = 14 + 18

Combine like terms: -18 + 18 = 0
0 + 4a = 14 + 18
4a = 14 + 18

Combine like terms: 14 + 18 = 32
4a = 32

Divide each side by '4'.
a = 8

Simplifying
a = 8

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