What is the solution to the equation 10 - (7x+3.5) = - 5.75+3 (x-2.5)

First distribute invisble - 1

-1 (7x+3.5) = - 7x-3.5

and distribute 3

3 (x-2.5) = 3x-7.5

now we have

10-7x-3.5=-5.75+3x-7.5

combine

6.5-7x=-13.25+3x

add 7x to both sides

6.5=-13.25+10x

add 13.25 to both sides

19.75=10x

divide both sides by 10

1.975=x