Question

Помогите!!!!!!!!!! !!!!!

Answer 1

№13
а) 15+x=7. б)(x-2)+13=-11
x=7-15. x-2=-13-11
x=15-7 x-2=-24
x=8. X=-24:(-2)
Х=12
№14
43-(-24)-150
43+24-150
-83
№15
3/25 - 4 1/8 -4 1/8 +3/15 =-7 93/100 =-7,93