Add the two given equations and get 3f + 5f = 1 + 7 8f = 8 f = 8/8 = 1. Then from first equation 3*1 + 4h = 1 4h = 1 - 3 4h = -2 h = -2/4 = -0.5. ANSWER. f = 1; h = -0.5.