-172=5a+7(-1+4a)

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Solution for -172=5a+7(-1+4a) equation:


Simplifying
-172 = 5a + 7(-1 + 4a)
-172 = 5a + (-1 * 7 + 4a * 7)
-172 = 5a + (-7 + 28a)

Reorder the terms:
-172 = -7 + 5a + 28a

Combine like terms: 5a + 28a = 33a
-172 = -7 + 33a

Solving
-172 = -7 + 33a

Solving for variable 'a'.

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

Add '-33a' to each side of the equation.
-172 + -33a = -7 + 33a + -33a

Combine like terms: 33a + -33a = 0
-172 + -33a = -7 + 0
-172 + -33a = -7

Add '172' to each side of the equation.
-172 + 172 + -33a = -7 + 172

Combine like terms: -172 + 172 = 0
0 + -33a = -7 + 172
-33a = -7 + 172

Combine like terms: -7 + 172 = 165
-33a = 165

Divide each side by '-33'.
a = -5

Simplifying
a = -5

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