2.5(х-10)+3(х+10)=56

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To solve this equation, we first need to distribute the coefficients:

2.5(x-10) + 3(x+10) = 56
2.5x - 25 + 3x + 30 = 56

Now we can combine like terms:

2.5x + 3x - 25 + 30 = 56
5.5x + 5 = 56

Next, we isolate the term with x by subtracting 5 from both sides:

5.5x = 51

And finally, we can solve for x by dividing both sides by 5.5:

x = 51/5.5
x = 9.2727

Therefore, the solution to the equation is x = 9.2727.