Answer:
Step-by-step explanation:
Let the two marbles number be purple, P and red marbles be R.
P + R = 43…Eq..1
As per statement the number of purple marbles is 1 less than 3 times the number of red marbles
P = 3R - 1…Eq..2
Now substituting the value of P from Eq..2 to Eq…1
P + R = 43
3R - 1 + R = 43
3R + R = 43 + 1
4R = 44
R = 44/4
R = 11
