The number of 64 is 86. Find this number

Let this number be X
5X+64=86
The solution is x = 22 / 5 = 4.4

4.5 times of a number is 100 more than 2 times of it. What is the number

Let this number be X
According to the meaning of the title
4.5x-2x=100
2,5x=100
x=100÷2.5
=40
A: the number is 40

Write an equation to solve a word problem. Subtract half of 1.6 from 4 times of a number. The difference is 3.4. Find the number

This number is X
4x-1.6×½=3.4
4x=3.4+0.8
4x=4.2
x=1.05
This number is 1.05

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