Answer:
e = 4 , f = 9
Explanation:
5e + f = 29 → (1)
5e - f = 11 → (2)
adding (1) and (2) term by term will eliminate f
(5e + 5e) + (f - f) = 29 + 11
10e + 0 = 40
10e = 40 ( divide both sides by 10 )
e = 4
substitute e = 4 into either of the 2 equations and solve for f
substituting into (1)
5(4) + f = 29
20 + f = 29 ( subtract 20 from both sides )
f = 9
then e = 4 and f = 9