A+a+a+80+90=100

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Solution for A+a+a+80+90=100 equation:


Simplifying
A + a + a + 80 + 90 = 100

Reorder the terms:
80 + 90 + A + a + a = 100

Combine like terms: 80 + 90 = 170
170 + A + a + a = 100

Combine like terms: a + a = 2a
170 + A + 2a = 100

Solving
170 + A + 2a = 100

Solving for variable 'A'.

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

Add '-170' to each side of the equation.
170 + A + -170 + 2a = 100 + -170

Reorder the terms:
170 + -170 + A + 2a = 100 + -170

Combine like terms: 170 + -170 = 0
0 + A + 2a = 100 + -170
A + 2a = 100 + -170

Combine like terms: 100 + -170 = -70
A + 2a = -70

Add '-2a' to each side of the equation.
A + 2a + -2a = -70 + -2a

Combine like terms: 2a + -2a = 0
A + 0 = -70 + -2a
A = -70 + -2a

Simplifying
A = -70 + -2a

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