3(a-7)-3(2a-4)=4(a+3)

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Solution for 3(a-7)-3(2a-4)=4(a+3) equation:


Simplifying
3(a + -7) + -3(2a + -4) = 4(a + 3)

Reorder the terms:
3(-7 + a) + -3(2a + -4) = 4(a + 3)
(-7 * 3 + a * 3) + -3(2a + -4) = 4(a + 3)
(-21 + 3a) + -3(2a + -4) = 4(a + 3)

Reorder the terms:
-21 + 3a + -3(-4 + 2a) = 4(a + 3)
-21 + 3a + (-4 * -3 + 2a * -3) = 4(a + 3)
-21 + 3a + (12 + -6a) = 4(a + 3)

Reorder the terms:
-21 + 12 + 3a + -6a = 4(a + 3)

Combine like terms: -21 + 12 = -9
-9 + 3a + -6a = 4(a + 3)

Combine like terms: 3a + -6a = -3a
-9 + -3a = 4(a + 3)

Reorder the terms:
-9 + -3a = 4(3 + a)
-9 + -3a = (3 * 4 + a * 4)
-9 + -3a = (12 + 4a)

Solving
-9 + -3a = 12 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
-9 + -3a + -4a = 12 + 4a + -4a

Combine like terms: -3a + -4a = -7a
-9 + -7a = 12 + 4a + -4a

Combine like terms: 4a + -4a = 0
-9 + -7a = 12 + 0
-9 + -7a = 12

Add '9' to each side of the equation.
-9 + 9 + -7a = 12 + 9

Combine like terms: -9 + 9 = 0
0 + -7a = 12 + 9
-7a = 12 + 9

Combine like terms: 12 + 9 = 21
-7a = 21

Divide each side by '-7'.
a = -3

Simplifying
a = -3

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