Question

1+2+3+4+5+6+7+8+9+=-x 45321

Answer 1

1+2+3+4+5+6+7+8+9=-x+45321
45+x=45321
x=45321-45
x=45276

Answer 2

1+2+3+4+5+6+7+8+9=-x+45321
45=-x+45321
x+45=45321
x=45321-45
x=45276
hope it's halping you.