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15x + 8 = 53

15x = 53-8 = 45

x = 45/15 = 3

1. We currently have 80% of the original price and aim to find 100%.

2. We know that 80% is equal to £29.40.

3. Dividing £29.40 by 80 gives the value of 1% which is £0...

1. We aim to factorise the numerator. This would give 6c(c^2 + 5).

2. We then factorise the denominator. This would give 3(c^2 + 5).

3. Since (c^2 + 5) is present in b...

2kx + 6ky + 4kz

=2k (x + 3y + 2z)

6a + b = 16    Equation 1
5a - 2b = 19    Equation 2

Scale up one equation so both equations have same coeffient of one variable ie 2 times Equ 1

12a + 2b = 32
5a - 2b = 19