Question

What's the use of algebra

Answer 1

to find the unknown value. and also to find the answer easliy

Answer 2

Mathematics in daily life –Example 1

When filling your car up with gas you can use a form of algebra. Lets say you only have £20.00 to spend on petrol today and petrol is £3.50 a gallon. How many gallons could you buy?

Let x = # of gallons of petrol

3.50x=20.00
x=5.71 gallons

Mathematics in daily life – Example 2

Lets say you need to buy a PS3. You have £400 to spend on everything. You know a new system costs £200 and extra controller £20. Assuming a game costs £30 how many games could you get?

black ps3 controller image picture image

Let x= the number of Games

£400 = £200 + £20 +£30x
400=230+30x
180=30x
x = 6 Games