3x-40+a=90

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Solution for 3x-40+a=90 equation:


Simplifying
3x + -40 + a = 90

Reorder the terms:
-40 + a + 3x = 90

Solving
-40 + a + 3x = 90

Solving for variable 'a'.

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

Add '40' to each side of the equation.
-40 + a + 40 + 3x = 90 + 40

Reorder the terms:
-40 + 40 + a + 3x = 90 + 40

Combine like terms: -40 + 40 = 0
0 + a + 3x = 90 + 40
a + 3x = 90 + 40

Combine like terms: 90 + 40 = 130
a + 3x = 130

Add '-3x' to each side of the equation.
a + 3x + -3x = 130 + -3x

Combine like terms: 3x + -3x = 0
a + 0 = 130 + -3x
a = 130 + -3x

Simplifying
a = 130 + -3x

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