Question

what is the value of K can you substitute into each of these expression to give you the same answer
(a) k+10
(b) 3k
c) 4k-5
2)A cookery Book show how long it will take in a minute to cook a joint of meat (a) electric oven time
$66 \times weight \: in \: kg + 35 \\ micowave \: time \: (26 \times weight \: in \: kg + 15$
how much quicker is it to cook a 2 kg joint of meat in a microwave oven than in an electric oven

Answer 1

First question the value of k is 5

Answer 2

in first question
k+10=3k so k= 5
we can substitute 5 for the same answer.