exam Maths Puzzle Numerical Ability

The ratio of the number of red beads to blue beads in a box was 3:1. 3 more red and 4 more beads were added and the ratio became 2:1. How many red beads were there at first?

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exam Other Question

Write the fraction in simplest form.

19. 14/4

Any help with this equation would be GREATLY appreciated.
Solve the following algebraically. You must show all your work. Alternately, you may type as cuberoot(x) and show raising to the nth power as ^n, like x 3 is typed x^3.
3 cuberoot(x)-4=2