Question

there are 450 mangoes and oranges in a fruit stall.There are twice as many mangoes as there are oranges

Answer 1

equation is 2x (mangoes) + x (oranges) = 450.

2x + x = 450
3x = 450
x = 150

so now we have the amount of oranges= 150

150 * 2 = 300

so oranges = 150, mangoes = 300, and to check our work
150 + 300 = 450

Answer 2

x +2x=450
3x=450
x=450/3
x=150

there are 150 oranges and 300 mangoes