Question
PSLE
At first, a box contained 4 blue balls and some green beads. After some blue balls were added, 35 of the balls were green. After 26 brown balls were added to the box and now, 37 of the beads were green. What was the number of blue balls added?
2 m

Click button first when a symbol is required. X

PSLE
At first, a box contained 4 blue balls and some green beads. After some blue balls were added, 35 of the balls were green. After 26 brown balls were added to the box and now, 37 of the beads were green. What was the number of blue balls added?