0.9x-0.7(4-x)=1.2

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Solution for 0.9x-0.7(4-x)=1.2 equation: 


Simplifying
0.9x + -0.7(4 + -1x) = 1.2
0.9x + (4 * -0.7 + -1x * -0.7) = 1.2
0.9x + (-2.8 + 0.7x) = 1.2

Reorder the terms:
-2.8 + 0.9x + 0.7x = 1.2

Combine like terms: 0.9x + 0.7x = 1.6x
-2.8 + 1.6x = 1.2

Solving
-2.8 + 1.6x = 1.2

Solving for variable 'x'.

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

Add '2.8' to each side of the equation.
-2.8 + 2.8 + 1.6x = 1.2 + 2.8

Combine like terms: -2.8 + 2.8 = 0.0
0.0 + 1.6x = 1.2 + 2.8
1.6x = 1.2 + 2.8

Combine like terms: 1.2 + 2.8 = 4
1.6x = 4

Divide each side by '1.6'.
x = 2.5

Simplifying
x = 2.5

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