0.9x+0.3*90=0.8(x+90)

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Solution for 0.9x+0.3*90=0.8(x+90) equation:


Simplifying
0.9x + 0.3 * 90 = 0.8(x + 90)

Multiply 0.3 * 90
0.9x + 27 = 0.8(x + 90)

Reorder the terms:
27 + 0.9x = 0.8(x + 90)

Reorder the terms:
27 + 0.9x = 0.8(90 + x)
27 + 0.9x = (90 * 0.8 + x * 0.8)
27 + 0.9x = (72 + 0.8x)

Solving
27 + 0.9x = 72 + 0.8x

Solving for variable 'x'.

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

Add '-0.8x' to each side of the equation.
27 + 0.9x + -0.8x = 72 + 0.8x + -0.8x

Combine like terms: 0.9x + -0.8x = 0.1x
27 + 0.1x = 72 + 0.8x + -0.8x

Combine like terms: 0.8x + -0.8x = 0.0
27 + 0.1x = 72 + 0.0
27 + 0.1x = 72

Add '-27' to each side of the equation.
27 + -27 + 0.1x = 72 + -27

Combine like terms: 27 + -27 = 0
0 + 0.1x = 72 + -27
0.1x = 72 + -27

Combine like terms: 72 + -27 = 45
0.1x = 45

Divide each side by '0.1'.
x = 450

Simplifying
x = 450

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