Solve for x. 15x + 6 = 10x + 21
O x=5
O x= 5 2/5
Ox= 3
Ox=-5 3/5
Will give you

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.