1. 3 + (7-2) = 3 + 5 = 8
2. 17 - (14 X 3) = 17 - 42 = - 25
3. 11 + (2 X 7) = 11 + 14 = 25
4. 100 - (11 x 8) X 4 = 100 - 88 = 12; 12 X 4 = 48
5. 27 X 3 - 6 = 54 - 6 = 75
Solve the following equations:
1. 4
x - 7 = 27
Add seven to both sides, and 4x = 34.
Divide by four to get x on its own, and
x = 8.5 (you can do this using an algorithm).
2. 3x - 27 = 45
Add 27 to both sides and 3x = 72.
Divide by 3 to get
x on its own, and
x = 24 (feel free to check this by multiplying 24 by 3
).
That's secondary school maths that most people can't remember how to do.[/QUOTE]