Question 1 Report
If 5(x + 2y) = 5 and 4(x + 3y) = 16, find 3(x + y)
Answer Details
5(x + 2y) = 5 ∴ x + 2y = 1.....(i) 4(x + 3y) = 16 = 42 x + 3y = 2 .....(ii) x + 2y = 1.....(i) x + 3y = 2......(ii) y = 1 Substitute y = 1 into equation (i) = x + 2y = 1 ∴ x + 2(1) = 1 x + 2 = 1 ∴ x = 1 ∴ 3x + y = 3-1 + 1 = 3 = 1