x+.4(3)=.90(x+4)

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Solution for x+.4(3)=.90(x+4) equation:


Simplifying
x + 0.4(3) = 0.90(x + 4)

Multiply 0.4 * 3
x + 1.2 = 0.90(x + 4)

Reorder the terms:
1.2 + x = 0.90(x + 4)

Reorder the terms:
1.2 + x = 0.90(4 + x)
1.2 + x = (4 * 0.90 + x * 0.90)
1.2 + x = (3.6 + 0.90x)

Solving
1.2 + x = 3.6 + 0.90x

Solving for variable 'x'.

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

Add '-0.90x' to each side of the equation.
1.2 + x + -0.90x = 3.6 + 0.90x + -0.90x

Combine like terms: x + -0.90x = 0.1x
1.2 + 0.1x = 3.6 + 0.90x + -0.90x

Combine like terms: 0.90x + -0.90x = 0.00
1.2 + 0.1x = 3.6 + 0.00
1.2 + 0.1x = 3.6

Add '-1.2' to each side of the equation.
1.2 + -1.2 + 0.1x = 3.6 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
0.0 + 0.1x = 3.6 + -1.2
0.1x = 3.6 + -1.2

Combine like terms: 3.6 + -1.2 = 2.4
0.1x = 2.4

Divide each side by '0.1'.
x = 24

Simplifying
x = 24

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