0.7x+0.3(4-x)=4

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Solution for 0.7x+0.3(4-x)=4 equation: 


Simplifying
0.7x + 0.3(4 + -1x) = 4
0.7x + (4 * 0.3 + -1x * 0.3) = 4
0.7x + (1.2 + -0.3x) = 4

Reorder the terms:
1.2 + 0.7x + -0.3x = 4

Combine like terms: 0.7x + -0.3x = 0.4x
1.2 + 0.4x = 4

Solving
1.2 + 0.4x = 4

Solving for variable 'x'.

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

Add '-1.2' to each side of the equation.
1.2 + -1.2 + 0.4x = 4 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
0.0 + 0.4x = 4 + -1.2
0.4x = 4 + -1.2

Combine like terms: 4 + -1.2 = 2.8
0.4x = 2.8

Divide each side by '0.4'.
x = 7

Simplifying
x = 7

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