Count the number of cubes shaded so the 7x11 is 77 square units
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The answers:
x = 1
y = -5
14.
1. 7 × 7 = 49
2. 7 × 3 × 3 = 63
3. 7 × 3 × 4 = 84
4. 7 + 3 + 4 = 14
Hope that helps! Feel free to ask for a more explanation, if needed.