(a+3)7=3

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Solution for (a+3)7=3 equation:


Simplifying
(a + 3) * 7 = 3

Reorder the terms:
(3 + a) * 7 = 3

Reorder the terms for easier multiplication:
7(3 + a) = 3
(3 * 7 + a * 7) = 3
(21 + 7a) = 3

Solving
21 + 7a = 3

Solving for variable 'a'.

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

Add '-21' to each side of the equation.
21 + -21 + 7a = 3 + -21

Combine like terms: 21 + -21 = 0
0 + 7a = 3 + -21
7a = 3 + -21

Combine like terms: 3 + -21 = -18
7a = -18

Divide each side by '7'.
a = -2.571428571

Simplifying
a = -2.571428571

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