Question

21. (i) 2x - Ž= 9; 3x + 7 = 2.
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Answer 1

Answer:

(1)Put the value of x= 1

2x-z=9

2×1-z=9

2- z=9

-z=9-2

-z=7

here x=1 and -z= 7

(2) take out the value of x

3x+7=2

3x=2-7

3x=-5

x=-5/3