7a-5+2a=15+40a

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Solution for 7a-5+2a=15+40a equation:


Simplifying
7a + -5 + 2a = 15 + 40a

Reorder the terms:
-5 + 7a + 2a = 15 + 40a

Combine like terms: 7a + 2a = 9a
-5 + 9a = 15 + 40a

Solving
-5 + 9a = 15 + 40a

Solving for variable 'a'.

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

Add '-40a' to each side of the equation.
-5 + 9a + -40a = 15 + 40a + -40a

Combine like terms: 9a + -40a = -31a
-5 + -31a = 15 + 40a + -40a

Combine like terms: 40a + -40a = 0
-5 + -31a = 15 + 0
-5 + -31a = 15

Add '5' to each side of the equation.
-5 + 5 + -31a = 15 + 5

Combine like terms: -5 + 5 = 0
0 + -31a = 15 + 5
-31a = 15 + 5

Combine like terms: 15 + 5 = 20
-31a = 20

Divide each side by '-31'.
a = -0.6451612903

Simplifying
a = -0.6451612903

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