7a-3(5a+10)=2

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Solution for 7a-3(5a+10)=2 equation:


Simplifying
7a + -3(5a + 10) = 2

Reorder the terms:
7a + -3(10 + 5a) = 2
7a + (10 * -3 + 5a * -3) = 2
7a + (-30 + -15a) = 2

Reorder the terms:
-30 + 7a + -15a = 2

Combine like terms: 7a + -15a = -8a
-30 + -8a = 2

Solving
-30 + -8a = 2

Solving for variable 'a'.

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

Add '30' to each side of the equation.
-30 + 30 + -8a = 2 + 30

Combine like terms: -30 + 30 = 0
0 + -8a = 2 + 30
-8a = 2 + 30

Combine like terms: 2 + 30 = 32
-8a = 32

Divide each side by '-8'.
a = -4

Simplifying
a = -4

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