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

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


Simplifying
4(5 + 7a) = 1 + 7a
(5 * 4 + 7a * 4) = 1 + 7a
(20 + 28a) = 1 + 7a

Solving
20 + 28a = 1 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
20 + 28a + -7a = 1 + 7a + -7a

Combine like terms: 28a + -7a = 21a
20 + 21a = 1 + 7a + -7a

Combine like terms: 7a + -7a = 0
20 + 21a = 1 + 0
20 + 21a = 1

Add '-20' to each side of the equation.
20 + -20 + 21a = 1 + -20

Combine like terms: 20 + -20 = 0
0 + 21a = 1 + -20
21a = 1 + -20

Combine like terms: 1 + -20 = -19
21a = -19

Divide each side by '21'.
a = -0.9047619048

Simplifying
a = -0.9047619048

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