Any hint on how to solve this

Question about the task

Only 20 will do

Java Syntax, Level 1, Lesson 4

Resolved

Hi, I wrote

package com.codegym.task.task01.task0137;

/*
Only 20 will do

*/

public class Solution {
    public static int a = 1;
    public static int b = 3;
    public static int c = 9;
    public static int d = 27;

    public static void main(String[] args) {

        int result = + a - b + c - d;

        System.out.println(result);
    }
}

To this I tried to use Math.abs() to get a positive number from negative number, but verification's last line keeps writing "incorrectly places signs". I also tried to add a variable to add it and get positive number. The same mistake. What's wrong?

In the main method, place plus and minus signs correctly so that the variable result is equal to 20.
Signs must be placed only in the line where the variable result is declared.
Do not change the order of the variables in this line.
Each variable must be preceded by either a plus or minus sign.

Requirements:

Values of variables: Do not change a, b, c, or d.
Each of the variables (a, b, c, and d) in the line where the variable result is declared must be preceded by either a plus or minus sign.
The program should display the number 20 on the screen.
The plus and minus signs must be placed correctly.

package com.codegym.task.task01.task0137; /* Only 20 will do */ public class Solution { public static int a = 1; public static int b = 3; public static int c = 9; public static int d = 27; public static int e = 40; public static void main(String[] args) { int result = + a - b + c - d + e; System.out.println(result); } }