Question

Pam has red and black marbles. The number of red marbles she has is three more than twice the number of black marbles. she has 42 marbles in all. how many red marbles does Pam have?

Answer 1

Answer:

let the black marbles be X

then the red marbles will be 2x + 3

A T Q

X + 2x + 3 = 42

3x + 3 = 42

3X = 42-3

X = 39/3

=13

black marbles = 13

red marbles = 2× 13+3

= 26+3

= 29