20a+10a-(20a+5a)+5a-(20a+10a)=1505

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Solution for 20a+10a-(20a+5a)+5a-(20a+10a)=1505 equation: 


Simplifying
20a + 10a + -1(20a + 5a) + 5a + -1(20a + 10a) = 1505

Combine like terms: 20a + 5a = 25a
20a + 10a + -1(25a) + 5a + -1(20a + 10a) = 1505

Remove parenthesis around (25a)
20a + 10a + -1 * 25a + 5a + -1(20a + 10a) = 1505

Multiply -1 * 25
20a + 10a + -25a + 5a + -1(20a + 10a) = 1505

Combine like terms: 20a + 10a = 30a
20a + 10a + -25a + 5a + -1(30a) = 1505

Remove parenthesis around (30a)
20a + 10a + -25a + 5a + -1 * 30a = 1505

Multiply -1 * 30
20a + 10a + -25a + 5a + -30a = 1505

Combine like terms: 20a + 10a = 30a
30a + -25a + 5a + -30a = 1505

Combine like terms: 30a + -25a = 5a
5a + 5a + -30a = 1505

Combine like terms: 5a + 5a = 10a
10a + -30a = 1505

Combine like terms: 10a + -30a = -20a
-20a = 1505

Solving
-20a = 1505

Solving for variable 'a'.

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

Divide each side by '-20'.
a = -75.25

Simplifying
a = -75.25

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