3(13-5a)=7(a+4)

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Solution for 3(13-5a)=7(a+4) equation:


Simplifying
3(13 + -5a) = 7(a + 4)
(13 * 3 + -5a * 3) = 7(a + 4)
(39 + -15a) = 7(a + 4)

Reorder the terms:
39 + -15a = 7(4 + a)
39 + -15a = (4 * 7 + a * 7)
39 + -15a = (28 + 7a)

Solving
39 + -15a = 28 + 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.
39 + -15a + -7a = 28 + 7a + -7a

Combine like terms: -15a + -7a = -22a
39 + -22a = 28 + 7a + -7a

Combine like terms: 7a + -7a = 0
39 + -22a = 28 + 0
39 + -22a = 28

Add '-39' to each side of the equation.
39 + -39 + -22a = 28 + -39

Combine like terms: 39 + -39 = 0
0 + -22a = 28 + -39
-22a = 28 + -39

Combine like terms: 28 + -39 = -11
-22a = -11

Divide each side by '-22'.
a = 0.5

Simplifying
a = 0.5

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