11-15 -7-10-3-20 7-30

( 11× 715× 10)+( 3×720×30) 77150 21600 308 21600 287600 ...

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Algebra of Complex Numbers

11/-15 -7/10+...

Question

$(\frac{11}{- 15}) (\frac{- 7}{10}) + (\frac{- 3}{20}) (\frac{7}{30})$

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Solution

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\frac{17}{- 30}, \frac{11}{- 15}, \frac{- 7}{10}, \frac{3}{5} .

3, 5, 7, 10, 11, 15, 15, 20,

Solve the following:

(i) x + 3 = 11; (ii) y − 9 = 21; (iii) 10 = z + 3; (iv) ; (v) 10x = 30; (vi) ;

(vii) ; (viii) ; (ix) 8x − 8 = 48; (x) ; (xi) ; (xii) ;

(xiii) 3 (x + 6) = 24; (xiv) ; (xv) 3(x + 2) − 2(x − 1) = 7.

X	$10$	$11$	$12$	$13$	$14$	$15$	$16$	$17$	$18$
f	$2$	$7$	$10$	$12$	$15$	$11$	$10$	$6$	$3$

\frac{1}{3 \times 7 \times 11} + \frac{1}{7 \times 11 \times 15} + \frac{1}{11 \times 15 \times 19} + . . .

20

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