Question

3. Verify/check by substitution that
(i) the root/value of 3x - 5 = 7 is x = 4
-2 is x = 2
(1) the root of 3 + 2x = 9 is x = 3 (1) the root of 5x -
(iv) the root of 8 -7y= 1 is y = 1​

Answer 1

Answer:

(i ) 3(4)-5=7

12-5=7 yes 4 is root

ofviously 2 is not root

(ii ) 3+2(3)=3

3+6#3

not a zero

8-7(1)=1

yes it is root

Answer 2

Step-by-step explanation:

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