7a=2(a-20)+30

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Solution for 7a=2(a-20)+30 equation:


Simplifying
7a = 2(a + -20) + 30

Reorder the terms:
7a = 2(-20 + a) + 30
7a = (-20 * 2 + a * 2) + 30
7a = (-40 + 2a) + 30

Reorder the terms:
7a = -40 + 30 + 2a

Combine like terms: -40 + 30 = -10
7a = -10 + 2a

Solving
7a = -10 + 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
7a + -2a = -10 + 2a + -2a

Combine like terms: 7a + -2a = 5a
5a = -10 + 2a + -2a

Combine like terms: 2a + -2a = 0
5a = -10 + 0
5a = -10

Divide each side by '5'.
a = -2

Simplifying
a = -2

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