6 (a) Simplify: (i) $2p + 5p - 3p$ (ii) $6j + 3k - j - 5k$ (b) Find the value of $10h + 6t$ when $h = 12$ and $t = 4$ - OCR - GCSE Maths - Question 6 - 2017 - Paper 1

For this expression, we will once again combine like terms:

$$6j - j + 3k - 5k = (6 - 1)j + (3 - 5)k = 5j - 2k$$

Therefore, the simplified expression is: 5j - 2k.

Substituting the values of $h$ and $t$:

$$10h + 6t = 10(12) + 6(4) = 120 + 24 = 144$$

Thus, the value is: 144.

To isolate $d$, we first rearrange the equation:

1. Move $f$ to the left side:

$$e - f = -7d$$

2. Divide both sides by -7:

$$d = \frac{f - e}{7}$$

Thus, the formula rearranged for $d$ is: $d = \frac{f - e}{7}$.