Answer:
The unknown sides (x) are 6 ft. long
Step-by-step explanation:
Add it all together:
x+x+5+7+10+10+12+14=70
Simplify a little more:
2x+58=70
Subtract 58 from both sides
2x+58 -58=70-58
Solve
2x=12
Divide by 2 on both sides
2/2x=12/2
Solve
x = 6
The unknown sides (x) are 6 ft. long
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