Question

2. Solve the following equations:
(a) 2(x + 4) = 12
(b) 3(n - 5) = 21​

Answer 1

Answer:

(a)2(x+4)=12

=2x+2x4=12

=2x+8=12

=2x=4

so x=2

(b)3(n-5)=21

=3n-3x5=21

=3n-15=21

=3n=36

=n=12

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Answer 2

Answer:

(a)2(x+4)=12

=2x+2x4=12

=2x+8=12

=2x=4

so x=2

(b)3(n-5)=21

=3n-3x5=21

=3n-15=21

=3n=36

=n=12