5(a-5)-5(3a+1)=9

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Solution for 5(a-5)-5(3a+1)=9 equation:


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

Reorder the terms:
5(-5 + a) + -5(3a + 1) = 9
(-5 * 5 + a * 5) + -5(3a + 1) = 9
(-25 + 5a) + -5(3a + 1) = 9

Reorder the terms:
-25 + 5a + -5(1 + 3a) = 9
-25 + 5a + (1 * -5 + 3a * -5) = 9
-25 + 5a + (-5 + -15a) = 9

Reorder the terms:
-25 + -5 + 5a + -15a = 9

Combine like terms: -25 + -5 = -30
-30 + 5a + -15a = 9

Combine like terms: 5a + -15a = -10a
-30 + -10a = 9

Solving
-30 + -10a = 9

Solving for variable 'a'.

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

Add '30' to each side of the equation.
-30 + 30 + -10a = 9 + 30

Combine like terms: -30 + 30 = 0
0 + -10a = 9 + 30
-10a = 9 + 30

Combine like terms: 9 + 30 = 39
-10a = 39

Divide each side by '-10'.
a = -3.9

Simplifying
a = -3.9

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