5(a-1)+4(a+2)=12

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Solution for 5(a-1)+4(a+2)=12 equation:


Simplifying
5(a + -1) + 4(a + 2) = 12

Reorder the terms:
5(-1 + a) + 4(a + 2) = 12
(-1 * 5 + a * 5) + 4(a + 2) = 12
(-5 + 5a) + 4(a + 2) = 12

Reorder the terms:
-5 + 5a + 4(2 + a) = 12
-5 + 5a + (2 * 4 + a * 4) = 12
-5 + 5a + (8 + 4a) = 12

Reorder the terms:
-5 + 8 + 5a + 4a = 12

Combine like terms: -5 + 8 = 3
3 + 5a + 4a = 12

Combine like terms: 5a + 4a = 9a
3 + 9a = 12

Solving
3 + 9a = 12

Solving for variable 'a'.

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

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

Combine like terms: 3 + -3 = 0
0 + 9a = 12 + -3
9a = 12 + -3

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

Divide each side by '9'.
a = 1

Simplifying
a = 1

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