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

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


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

Reorder the terms:
7(-1 + a) = 3(a + 1)
(-1 * 7 + a * 7) = 3(a + 1)
(-7 + 7a) = 3(a + 1)

Reorder the terms:
-7 + 7a = 3(1 + a)
-7 + 7a = (1 * 3 + a * 3)
-7 + 7a = (3 + 3a)

Solving
-7 + 7a = 3 + 3a

Solving for variable 'a'.

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

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

Combine like terms: 7a + -3a = 4a
-7 + 4a = 3 + 3a + -3a

Combine like terms: 3a + -3a = 0
-7 + 4a = 3 + 0
-7 + 4a = 3

Add '7' to each side of the equation.
-7 + 7 + 4a = 3 + 7

Combine like terms: -7 + 7 = 0
0 + 4a = 3 + 7
4a = 3 + 7

Combine like terms: 3 + 7 = 10
4a = 10

Divide each side by '4'.
a = 2.5

Simplifying
a = 2.5

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