4a+5+3a-6=90

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Solution for 4a+5+3a-6=90 equation:


Simplifying
4a + 5 + 3a + -6 = 90

Reorder the terms:
5 + -6 + 4a + 3a = 90

Combine like terms: 5 + -6 = -1
-1 + 4a + 3a = 90

Combine like terms: 4a + 3a = 7a
-1 + 7a = 90

Solving
-1 + 7a = 90

Solving for variable 'a'.

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

Add '1' to each side of the equation.
-1 + 1 + 7a = 90 + 1

Combine like terms: -1 + 1 = 0
0 + 7a = 90 + 1
7a = 90 + 1

Combine like terms: 90 + 1 = 91
7a = 91

Divide each side by '7'.
a = 13

Simplifying
a = 13

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