Question 1 - Figure it out - Page 185 to 189 - Chapter 7 Class 7 - Finding the Unknown (Ganita Prakash II)

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Question 1 Fill in the blanks with integers. (a) 5 × ___ – 8 = 37We write the equation as 5x – 8 = 37 Putting 8 on right side, it becomes addition 5x = 37 + 8 5x = 45 Putting 5 on right side, it becomes division x = 45/5 x = 9 Thus, blank is 9 Question 1 Fill in the blanks with integers. (b) 37 – (33 – ____ ) = 35We write the equation as 37 – (33 – x) = 35 Opening bracket 37 – 33 + x = 35 4 + x = 35 Putting 4 on right side, it becomes subtraction x = 35 – 4 x = 31 Thus, blank is 31 Question 1 Fill in the blanks with integers. (c) – 3 × (– 11 + ____ ) = 45We write the equation as –3 × (–11 + x) = 45 Opening bracket –3 × –11 + (–3) × x = 45 3 × 11 + (–3) × x = 45 33 – 3x = 45 Putting 33 on right side, it becomes subtraction –3x = 45 – 33 –3x = 12 Putting –3 on right side, it becomes division Note: –3 doesn’t become plus 3, as Multiplication → Division x = 12/(−3) x = (−12)/3 x = –4 Thus, blank is –4