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given 17= 37 + 4f; f = 5

first to solve for variable f
by subtracting the right of the equal sign from both sides of the equations
solve: -4f each side of the equation 17 + -4f = 37 + 4f + -4f
combine like terms: 4f + -4f =0 so 17 + -4f = 37 + 0
17 + -4f = 37 then add - 17 to each side of the equation
17 + -17 + -4f = 37 + -17 to combine the like terms: 17 + -17=0
0 + -4f = 37 + -17
-4f = 37 + -17
combine: 37 + -17 = 20
-4f = 20 divide each side by -4 so the answer is f= -5
i hope you will understand my answers. you.