Make r the subject of the formula: 1/r -1/p = 1/t
- Take the 1/p to the other side of the equation1/r = 1/t + 1/p2) Add the fractions together by making the denominators the same1/r = (p+t)/pt3) Cross multiple by multiplying each side of the equation by the other side’s denominatorpt = r(p+t)4) Divide both sides by (p+t)pt/(p+t) = r
AA
Related Maths GCSE answers
All answers ▸An item costs £65 but requires an additional 20% VAT to be added. How much change will you get from £100
The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5 Work out the area of the triangle.
Factorise the expression given
There are n sweets in a bag. 6 are orange. A random sweet gets eaten, and then a second one. The probability that both sweets are orange is 1/3. Find n.