7(1+3a)=-7(-5a-3)

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Solution for 7(1+3a)=-7(-5a-3) equation:


Simplifying
7(1 + 3a) = -7(-5a + -3)
(1 * 7 + 3a * 7) = -7(-5a + -3)
(7 + 21a) = -7(-5a + -3)

Reorder the terms:
7 + 21a = -7(-3 + -5a)
7 + 21a = (-3 * -7 + -5a * -7)
7 + 21a = (21 + 35a)

Solving
7 + 21a = 21 + 35a

Solving for variable 'a'.

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

Add '-35a' to each side of the equation.
7 + 21a + -35a = 21 + 35a + -35a

Combine like terms: 21a + -35a = -14a
7 + -14a = 21 + 35a + -35a

Combine like terms: 35a + -35a = 0
7 + -14a = 21 + 0
7 + -14a = 21

Add '-7' to each side of the equation.
7 + -7 + -14a = 21 + -7

Combine like terms: 7 + -7 = 0
0 + -14a = 21 + -7
-14a = 21 + -7

Combine like terms: 21 + -7 = 14
-14a = 14

Divide each side by '-14'.
a = -1

Simplifying
a = -1

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