△abc≅△def, bc=4x−12, and ef=−3x+16. find x and ef.
x = -2 and ef = 22
x = 5 and ef = 8
x = 4 and ef = 4
x = 6 and ef = 12

Ineed to know the answer to this algebra question.

If the diagram polygon abcd is a reflection across ef to make polygon a'b'c'd'.

Eric and shiloh each have a savings account. the ratio of eric’s account balance to shiloh’s account balance is 4: 3. together they have a total of $140 in their accounts. use the tape diagram below to you determine the balance of eric’s account.