57=-3(1+5a)

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Solution for 57=-3(1+5a) equation:


Simplifying
57 = -3(1 + 5a)
57 = (1 * -3 + 5a * -3)
57 = (-3 + -15a)

Solving
57 = -3 + -15a

Solving for variable 'a'.

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

Add '15a' to each side of the equation.
57 + 15a = -3 + -15a + 15a

Combine like terms: -15a + 15a = 0
57 + 15a = -3 + 0
57 + 15a = -3

Add '-57' to each side of the equation.
57 + -57 + 15a = -3 + -57

Combine like terms: 57 + -57 = 0
0 + 15a = -3 + -57
15a = -3 + -57

Combine like terms: -3 + -57 = -60
15a = -60

Divide each side by '15'.
a = -4

Simplifying
a = -4

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