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konstantin123 [22]
2 years ago
6

Please help me in Math

Mathematics
1 answer:
Rashid [163]2 years ago
8 0
1. You can add 7 units to both sides of the scale so it becomes a balance between x on the left and 21 on the right.
  x ___ 21

1A) The only number from the set that will keep the balance is x ∈ {21}
1B) The number on the right (21) will be more than x for x ∈ {0, 1, 7, 14}
1C) The number on the right (21) will be less than x for x ∈ {28, 30}


2A) (x +x +x) +(2 +4) = 102
  3x +6 = 102 . . . . . . . . simplified equation

2B) Solving the equation, you have
  3x = 102 -6
  x = 96/3 = 32
The number that could be a value of x is 32.
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