Answer:
8(x+6)
Step-by-step explanation:

1) Since these triangles are congruent, then we can write out the following for congruent triangles have congruent sides:

2) Still based on that principle, we can plug v=2 into any of those formulas to get the measure of QS and TV. So let's pick the simpler one:

As we can see these segments are congruent.
46
When it says f(4) that means x=4
So you then just fill in all the x’s with 4’s and solve as normal
10 + x = 62
62: Total Amount
10: The sum of 10
X: Jenny’s savings
Hope this helps but I think the answer is 12.