3(a-7)+4=5(9-a)

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Solution for 3(a-7)+4=5(9-a) equation:


Simplifying
3(a + -7) + 4 = 5(9 + -1a)

Reorder the terms:
3(-7 + a) + 4 = 5(9 + -1a)
(-7 * 3 + a * 3) + 4 = 5(9 + -1a)
(-21 + 3a) + 4 = 5(9 + -1a)

Reorder the terms:
-21 + 4 + 3a = 5(9 + -1a)

Combine like terms: -21 + 4 = -17
-17 + 3a = 5(9 + -1a)
-17 + 3a = (9 * 5 + -1a * 5)
-17 + 3a = (45 + -5a)

Solving
-17 + 3a = 45 + -5a

Solving for variable 'a'.

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

Add '5a' to each side of the equation.
-17 + 3a + 5a = 45 + -5a + 5a

Combine like terms: 3a + 5a = 8a
-17 + 8a = 45 + -5a + 5a

Combine like terms: -5a + 5a = 0
-17 + 8a = 45 + 0
-17 + 8a = 45

Add '17' to each side of the equation.
-17 + 17 + 8a = 45 + 17

Combine like terms: -17 + 17 = 0
0 + 8a = 45 + 17
8a = 45 + 17

Combine like terms: 45 + 17 = 62
8a = 62

Divide each side by '8'.
a = 7.75

Simplifying
a = 7.75

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