Respuesta :
it is - 36 because move the variable to the left hand side and change it sign the. are the number 15 +21 = 36. also change the signs on both sides of the equation
Answer:
x=-36
Step-by-step explanation:
- -7=x/3+5
- -21=x+15
- -21-x=15
- -x=15+21
- -x=36
- x=-36