6.40*x+5.20*(6-x)=6*6

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Solution for 6.40*x+5.20*(6-x)=6*6 equation:


6.40*x+5.20*(6-x)=6*6

We simplify the equation to the form, which is simple to understand 
6.40*x+5.20*(6-x)=6*6

Simplifying:
+6.4x+5.20*(6-x)=6*6

Simplifying:
+6.4x+5.20*(6-x)=+36

Reorder the terms in parentheses
+6.4x+(+31.2-5.2x)=+36

Remove unnecessary parentheses
+6.4x+31.2-5.2x=+36

We move all terms containing x to the left and all other terms to the right. 
+6.4x-5.2x=+36-31.2

We simplify left and right side of the equation. 
+1.2x=+4.8

We divide both sides of the equation by 1.2 to get x. 
x=4

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