4(a-1)+1=-21(a-1)4+1-1

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Solution for 4(a-1)+1=-21(a-1)4+1-1 equation:


Simplifying
4(a + -1) + 1 = -21(a + -1) * 4 + 1 + -1

Reorder the terms:
4(-1 + a) + 1 = -21(a + -1) * 4 + 1 + -1
(-1 * 4 + a * 4) + 1 = -21(a + -1) * 4 + 1 + -1
(-4 + 4a) + 1 = -21(a + -1) * 4 + 1 + -1

Reorder the terms:
-4 + 1 + 4a = -21(a + -1) * 4 + 1 + -1

Combine like terms: -4 + 1 = -3
-3 + 4a = -21(a + -1) * 4 + 1 + -1

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

Reorder the terms for easier multiplication:
-3 + 4a = -21 * 4(-1 + a) + 1 + -1

Multiply -21 * 4
-3 + 4a = -84(-1 + a) + 1 + -1
-3 + 4a = (-1 * -84 + a * -84) + 1 + -1
-3 + 4a = (84 + -84a) + 1 + -1

Reorder the terms:
-3 + 4a = 84 + 1 + -1 + -84a

Combine like terms: 84 + 1 = 85
-3 + 4a = 85 + -1 + -84a

Combine like terms: 85 + -1 = 84
-3 + 4a = 84 + -84a

Solving
-3 + 4a = 84 + -84a

Solving for variable 'a'.

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

Add '84a' to each side of the equation.
-3 + 4a + 84a = 84 + -84a + 84a

Combine like terms: 4a + 84a = 88a
-3 + 88a = 84 + -84a + 84a

Combine like terms: -84a + 84a = 0
-3 + 88a = 84 + 0
-3 + 88a = 84

Add '3' to each side of the equation.
-3 + 3 + 88a = 84 + 3

Combine like terms: -3 + 3 = 0
0 + 88a = 84 + 3
88a = 84 + 3

Combine like terms: 84 + 3 = 87
88a = 87

Divide each side by '88'.
a = 0.9886363636

Simplifying
a = 0.9886363636

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