Answer:
31
Step-by-step explanation:
For rectangle ABCD, AC and BD are the lengths of the diagonals. The diagonals of a rectangle are congruent.
AC = BD
3x + 7 = 131 - x
Add x to both sides.
4x + 7 = 131
Subtract 7 from both sides.
4x = 124
Divide both sides by 4.
x = 31
the answer is 7 hope I could
76) 10n^8
77) 35v^11
78) 2025/n^2
79) 4k^8
1. x=−1 or x=−5
2. x=9 or x=−15
3.x=3 or x=−3
Answer:8
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