.1(x+30)+0.3x=7

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Solution for .1(x+30)+0.3x=7 equation:


Simplifying
0.1(x + 30) + 0.3x = 7

Reorder the terms:
0.1(30 + x) + 0.3x = 7
(30 * 0.1 + x * 0.1) + 0.3x = 7
(3 + 0.1x) + 0.3x = 7

Combine like terms: 0.1x + 0.3x = 0.4x
3 + 0.4x = 7

Solving
3 + 0.4x = 7

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 0.4x = 7 + -3

Combine like terms: 3 + -3 = 0
0 + 0.4x = 7 + -3
0.4x = 7 + -3

Combine like terms: 7 + -3 = 4
0.4x = 4

Divide each side by '0.4'.
x = 10

Simplifying
x = 10

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