Solve the following system by graphing.
y = x + 3x + 5
y = -x+2

#12 find the value of x. #13 find the value of the variable.

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee, f, for a single job is a function of the number, t, of hours it takes him to complete the job. write the function's formula.

What is the value of x in the this question ?