10(0.1x-0.3)=0.2(x+21)

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Solution for 10(0.1x-0.3)=0.2(x+21) equation:


Simplifying
10(0.1x + -0.3) = 0.2(x + 21)

Reorder the terms:
10(-0.3 + 0.1x) = 0.2(x + 21)
(-0.3 * 10 + 0.1x * 10) = 0.2(x + 21)
(-3 + 1x) = 0.2(x + 21)

Reorder the terms:
-3 + 1x = 0.2(21 + x)
-3 + 1x = (21 * 0.2 + x * 0.2)
-3 + 1x = (4.2 + 0.2x)

Solving
-3 + 1x = 4.2 + 0.2x

Solving for variable 'x'.

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

Add '-0.2x' to each side of the equation.
-3 + 1x + -0.2x = 4.2 + 0.2x + -0.2x

Combine like terms: 1x + -0.2x = 0.8x
-3 + 0.8x = 4.2 + 0.2x + -0.2x

Combine like terms: 0.2x + -0.2x = 0.0
-3 + 0.8x = 4.2 + 0.0
-3 + 0.8x = 4.2

Add '3' to each side of the equation.
-3 + 3 + 0.8x = 4.2 + 3

Combine like terms: -3 + 3 = 0
0 + 0.8x = 4.2 + 3
0.8x = 4.2 + 3

Combine like terms: 4.2 + 3 = 7.2
0.8x = 7.2

Divide each side by '0.8'.
x = 9

Simplifying
x = 9

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