The blank is 7
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Let the missing number be n.
Given equation:
- (3 × 5) + (6 × 5) = (16 × 5) - (n × 5)
Option 1
All terms have ×5, so we can cancel it. Then we get:
- 3 + 6 = 16 - n
- 9 = 16 - n
- n = 16 - 9
- n = 7
Option 2
Solve it in below steps:
- (3 × 5) + (6 × 5) = (16 × 5) - (n × 5)
- (3 + 6) × 5 = (16 - n) × 5
- 9 × 5 = (16 - n) × 5
- 9 = 16 - n
- n = 7
Option 3
Simplify by calculation:
- (3 × 5) + (6 × 5) = (16 × 5) - (n × 5)
- 15 + 30 = 80 - 5n
- 45 = 80 - 5n
- 5n = 80 - 45
- 5n = 35
- n = 7