Question

1. Determine by substitution, if 3 is a root of 2x + 6 = 12.


2. Express the following as algebraic equation :


a) Four times a number increased by 4 is 44.


b) 23 subtracted from 8 times a number is (-7).​

Answer 1

Answer:

put x=3 in 1st

so

2x+6=12

LHS=2×3+6

=6+6

=12=RHS

Answer 2

Answer:

Determine by substitution, if 3 is a root of 2x + 6 = 12.