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4 / 9 of a number is 3 and 1 / 2 more than 25% of the number. What is the number? (use equation solution)
Let this number be x, then the equation can be listed as follows:
（4/9）x=25%x+7/2
Multiply both sides by 36 to get: 16x = 9x + 126
The solution is: x = 18
The sum of two times of a number plus nine is five times of this number, so we can find the number? Equation
Let X. 2x + 9 = 5x, 3x = 9, x = 3
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