-28-7a=7(3+6a)

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Solution for -28-7a=7(3+6a) equation:


Simplifying
-28 + -7a = 7(3 + 6a)
-28 + -7a = (3 * 7 + 6a * 7)
-28 + -7a = (21 + 42a)

Solving
-28 + -7a = 21 + 42a

Solving for variable 'a'.

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

Add '-42a' to each side of the equation.
-28 + -7a + -42a = 21 + 42a + -42a

Combine like terms: -7a + -42a = -49a
-28 + -49a = 21 + 42a + -42a

Combine like terms: 42a + -42a = 0
-28 + -49a = 21 + 0
-28 + -49a = 21

Add '28' to each side of the equation.
-28 + 28 + -49a = 21 + 28

Combine like terms: -28 + 28 = 0
0 + -49a = 21 + 28
-49a = 21 + 28

Combine like terms: 21 + 28 = 49
-49a = 49

Divide each side by '-49'.
a = -1

Simplifying
a = -1

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