42-4*4.4+75+a=180

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Solution for 42-4*4.4+75+a=180 equation: 


Simplifying
42 + -4 * 4.4 + 75 + a = 180

Multiply -4 * 4.4
42 + -17.6 + 75 + a = 180

Combine like terms: 42 + -17.6 = 24.4
24.4 + 75 + a = 180

Combine like terms: 24.4 + 75 = 99.4
99.4 + a = 180

Solving
99.4 + a = 180

Solving for variable 'a'.

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

Add '-99.4' to each side of the equation.
99.4 + -99.4 + a = 180 + -99.4

Combine like terms: 99.4 + -99.4 = 0.0
0.0 + a = 180 + -99.4
a = 180 + -99.4

Combine like terms: 180 + -99.4 = 80.6
a = 80.6

Simplifying
a = 80.6

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