Step-by-step explanation:
[tex]( - 10x - 7) - (3x - 10) \\ = - 10x - 7 - 3x + 10 \\ = - 10x - 3x + 10 - 7 \\ = - 13x + 3 \\ [/tex]
(-10x-7)-(3x-10)
= -10x-7- 3x+10
= 3-13x
