A. Find the value of the unknown variable.
1.3m + 7= 25
2.X -- 12 = 16
3.2n -- 5 = 5
4.the sum of 25 and a number is six times that number. what is the number?
5. two times a number minus 5 is equal to the sum of ten and five. what is the number?
1.3m + 7= 25
2.X -- 12 = 16
3.2n -- 5 = 5
4.the sum of 25 and a number is six times that number. what is the number?
5. two times a number minus 5 is equal to the sum of ten and five. what is the number?
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Answer:
1.) m = 6 ( 3×6+7 = 25 )
2.) X = 28 ( 28 - 12 = 16 )
3.) n = 5 ( 2×5 - 5 = 5 )
4.) X = 5 ( 25 + 5 = 30 )
5.) X = 10 ( 10×2 - 5 = 10 + 5 )
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