What about simultaneous equations?
They are equations with variables that we have to find. They hold in the same time.
SO
Related Maths GCSE answers
All answers ▸Calculate the interest on borrowing £40 for 3 years if the compound interest rate is 5% per year.
Solve the simultaneous equations 5x + y = 21, and x - 3y = 9.
Nancy is driving and makes a wrong turn. The satnav indicates that her journey will take an extra 7 minutes. Nancy drives at an average speed of 60km/h to the nearest 5km/h. What's the greatest possible distance traveled in this detour in km to 2.d.p?
Calculate the largest share when £400 is shared in the ratio 1 : 2 : 5.