x : y = 7 : 4, x + y =88. Work out the value of x - y.
Here we use the ratios given to calculate the answer. First we sum add 7 and 4 to find total parts. 7 + 4 = 11. Then we divide 88 by 11. 88/11 = 8.This means we know that each part in the given ratio is 8.Hence, 7 x 48= 56 = x and 4 x 8 = 32 = y.Now we know the value of x and y we can calculate x - y = 56 - 32 = 24.
AC
Related Maths GCSE answers
All answers ▸In a village the number of houses and the number of flats are in the ratio 7 : 4 the number of flats and the number of bungalows are in the ratio 8 : 5 There are 50 bungalows in the village. How many houses are there in the village?
How do you solve the quadratic equation x^2+7x+12=0
Simplify (2x+3)^2 - (2x +3)(x-5). Give your answer in the form ax^2 +bx +c
A flight travels at 750kmph for 7 hours and 18 minutes, work out the distance travelled? Then convert 750 km/h into metres per second.