40a+80b+90c+120d=900

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Solution for 40a+80b+90c+120d=900 equation:


Simplifying
40a + 80b + 90c + 120d = 900

Solving
40a + 80b + 90c + 120d = 900

Solving for variable 'a'.

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

Add '-80b' to each side of the equation.
40a + 80b + 90c + -80b + 120d = 900 + -80b

Reorder the terms:
40a + 80b + -80b + 90c + 120d = 900 + -80b

Combine like terms: 80b + -80b = 0
40a + 0 + 90c + 120d = 900 + -80b
40a + 90c + 120d = 900 + -80b

Add '-90c' to each side of the equation.
40a + 90c + -90c + 120d = 900 + -80b + -90c

Combine like terms: 90c + -90c = 0
40a + 0 + 120d = 900 + -80b + -90c
40a + 120d = 900 + -80b + -90c

Add '-120d' to each side of the equation.
40a + 120d + -120d = 900 + -80b + -90c + -120d

Combine like terms: 120d + -120d = 0
40a + 0 = 900 + -80b + -90c + -120d
40a = 900 + -80b + -90c + -120d

Divide each side by '40'.
a = 22.5 + -2b + -2.25c + -3d

Simplifying
a = 22.5 + -2b + -2.25c + -3d

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