Solve this equation: (10/26)=(x/2).
The best way to solve this problem would be to cross-multiply. In other words, you would multiply the numerator of the first fraction by the denominator of the second fraction, and vice versa. In this case, you would multiply 10 by 2, and x by 26. Then you would get: 26x=20. Divide both sides by 26 to get: x=(10/13).
Solve the equation: (1/5) divided by (2/7).
When dividing fractions, you have to multiply by the reciprocal of the second fraction. In this case, you would flip (2/7) and make it (7/2). You would then multiply (7/2) by (1/5) to get (7/10).
Solve the equation: x^2-5x+15=0
In order to solve this problem, you would need to use the quadratic formula. First, find that b^2-4ac=25-4(1)(15)= -35. Since the answer is negative, the equation will have two complex conjugates. Thus, plugging this into the quadratic formula, you get: x= (5+i(root 35))/2) and (5-i(root 35))/2).