10a-3(2a+5)=15

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Solution for 10a-3(2a+5)=15 equation:


Simplifying
10a + -3(2a + 5) = 15

Reorder the terms:
10a + -3(5 + 2a) = 15
10a + (5 * -3 + 2a * -3) = 15
10a + (-15 + -6a) = 15

Reorder the terms:
-15 + 10a + -6a = 15

Combine like terms: 10a + -6a = 4a
-15 + 4a = 15

Solving
-15 + 4a = 15

Solving for variable 'a'.

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

Add '15' to each side of the equation.
-15 + 15 + 4a = 15 + 15

Combine like terms: -15 + 15 = 0
0 + 4a = 15 + 15
4a = 15 + 15

Combine like terms: 15 + 15 = 30
4a = 30

Divide each side by '4'.
a = 7.5

Simplifying
a = 7.5

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