Question

A supermarket has 358 oranges and kiwis altogether. After selling 2/7 of the oranges and 35 kiwis, the ratio of the number of oranges to the number of kiwis left is 2:1. Find the total number of oranges and kiwis left.

Answer 1

o+k = 358
(5/7 o)/(k-35) = 2
now solve as usual

Answer 2

Let’s say there has x oranges and
y kiwis
So we know that
x + y = 358 (1)

(1-2/7)x/y-35 = 2/1

5/7x = 2y - 70 (2)
2x (1) + (2)

So 19/7x = 646
x + 238, so y = 120
So (1-2/7)x = 170, y - 35 = 85

So oranges left 170
kiwis left 85
Solve the equation by setting unknowns