10a+15(a-7)=

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Solution for 10a+15(a-7)= equation:


Simplifying
10a + 15(a + -7) = 0

Reorder the terms:
10a + 15(-7 + a) = 0
10a + (-7 * 15 + a * 15) = 0
10a + (-105 + 15a) = 0

Reorder the terms:
-105 + 10a + 15a = 0

Combine like terms: 10a + 15a = 25a
-105 + 25a = 0

Solving
-105 + 25a = 0

Solving for variable 'a'.

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

Add '105' to each side of the equation.
-105 + 105 + 25a = 0 + 105

Combine like terms: -105 + 105 = 0
0 + 25a = 0 + 105
25a = 0 + 105

Combine like terms: 0 + 105 = 105
25a = 105

Divide each side by '25'.
a = 4.2

Simplifying
a = 4.2

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