13x-1
Is the answer, you have to get all you terms that being x+6+12x-7
6-7=-1
X+12x=13x
Put them together with the Xs first
13x-1
You should start with an equation.

The 'x' represents the week.
so now, we have to subtract 125 from the total amount which is 245.

now we have

to find 'x', we must divide 15 on each side

we are now left with

that means Sierra will have 8 weeks until she has enough money to buy the bike
It might be 9 if it's not 6 ...but I can't see how it wouldn't be 6?
Answer:
12g8h10
Multiply each variable quantity by 2 and combine.
The first question is “32.4”
I’ll come back if I find the other