.4(a+10)=.25(a+20)

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Solution for .4(a+10)=.25(a+20) equation:


Simplifying
0.4(a + 10) = 0.25(a + 20)

Reorder the terms:
0.4(10 + a) = 0.25(a + 20)
(10 * 0.4 + a * 0.4) = 0.25(a + 20)
(4 + 0.4a) = 0.25(a + 20)

Reorder the terms:
4 + 0.4a = 0.25(20 + a)
4 + 0.4a = (20 * 0.25 + a * 0.25)
4 + 0.4a = (5 + 0.25a)

Solving
4 + 0.4a = 5 + 0.25a

Solving for variable 'a'.

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

Add '-0.25a' to each side of the equation.
4 + 0.4a + -0.25a = 5 + 0.25a + -0.25a

Combine like terms: 0.4a + -0.25a = 0.15a
4 + 0.15a = 5 + 0.25a + -0.25a

Combine like terms: 0.25a + -0.25a = 0.00
4 + 0.15a = 5 + 0.00
4 + 0.15a = 5

Add '-4' to each side of the equation.
4 + -4 + 0.15a = 5 + -4

Combine like terms: 4 + -4 = 0
0 + 0.15a = 5 + -4
0.15a = 5 + -4

Combine like terms: 5 + -4 = 1
0.15a = 1

Divide each side by '0.15'.
a = 6.666666667

Simplifying
a = 6.666666667

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