0.1(x+30)-0.07(x-40)=4

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Solution for 0.1(x+30)-0.07(x-40)=4 equation:


Simplifying
0.1(x + 30) + -0.07(x + -40) = 4

Reorder the terms:
0.1(30 + x) + -0.07(x + -40) = 4
(30 * 0.1 + x * 0.1) + -0.07(x + -40) = 4
(3 + 0.1x) + -0.07(x + -40) = 4

Reorder the terms:
3 + 0.1x + -0.07(-40 + x) = 4
3 + 0.1x + (-40 * -0.07 + x * -0.07) = 4
3 + 0.1x + (2.8 + -0.07x) = 4

Reorder the terms:
3 + 2.8 + 0.1x + -0.07x = 4

Combine like terms: 3 + 2.8 = 5.8
5.8 + 0.1x + -0.07x = 4

Combine like terms: 0.1x + -0.07x = 0.03x
5.8 + 0.03x = 4

Solving
5.8 + 0.03x = 4

Solving for variable 'x'.

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

Add '-5.8' to each side of the equation.
5.8 + -5.8 + 0.03x = 4 + -5.8

Combine like terms: 5.8 + -5.8 = 0.0
0.0 + 0.03x = 4 + -5.8
0.03x = 4 + -5.8

Combine like terms: 4 + -5.8 = -1.8
0.03x = -1.8

Divide each side by '0.03'.
x = -60

Simplifying
x = -60

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