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please answer this question

in 2 min

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Answer 1

ANSWERS WITH EXPLANATION:

1. (a) x–1=0 (b) x+1=0

=> x = 0+1 => x=0-1

=> x = 1 => x=–1

(c) x–1=5 (d) x + 6 = 2

=> x = 5+1 => x = 2–6

=> x = 6 => x=–4

(e) y–4= –7 (f) y–4=4

=> y = –7+4 => y = 4+4

=> y = –3 => y = 8

(g) y+4=4 (h) y+4 = –4

=> y = 4–4 => y = –4–4

=> y = 0 => y = –8

NOTE : ABOVE CASES ONLY CONSIST OF TRANSPOSITION METHOD. MINUS BECOMES PLUS WHEN PLACED ON RHS FROM LHS AND VICE-VERSA.

2. (a) 3l = 42 (b) b/2 = 6

=> l = 42/3 => b = 6×2

=> l = 14 => b = 12

(c) p/7 = 4 (d) 4x = 25

=> p = 7×4 => x = 25/4

=> p = 28 => x = 6.25

(e) 8y = 36 (f) z/3 = 5/4

=> y = 36/8 => 3×z/3 = 3×(5/4)

=> y = 4.5 => z = 15/4 (3.75)

(g) a/5 = 7/15 (h)20t = –10

=> 5×a/5 = 5×(7/15) => t = –10/20

=> a = 2+(1/3) => t = -1/2

Q3 & Q4 ARE DESCRIBED IN THE IMAGES SENT ABOVE.

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