B- using the distributive property, -2 times 5x is -10x, and -2 times -3 is 6. Therefore, an equivalent expression is 8-10+6
E- you can swap 8 to the opposite side of the equation, resulting in -2(5x-3)+8. From here, you distribute and get -10x+6+8. 6+8=14. Therefore, -10x+14 is equivalent.
