solve the simultaneous equation: 5x+y =21 and x-3y=9
5x+y=215x-15y=45
16y = -24 y = -1.5
5x -1.5 =215x=22.5x=4.5
CM
Related Maths GCSE answers
All answers ▸at a shop in the US tax is added onto the price of an item at the till. this shop adds 5.7% of the items value to the total cost. if you buy a ball priced as $15, how much will you have to pay ?
√5( √8 +√18) can be written in the form a√10 where a is an integer.
solve (y+1)^2 = 4
If a spinner was spun 50 times and the probability to show the number 2 was 0.2, how many times would it show the number 2?