To get this answer, first write an equation based on the formula for the area of a rectangle. 2 * (x - 3) = 22. Then, solve the equation. Distribute the 2 to all of the terms in the parenthesis to get the equation: 2x - 6 = 22. After that, use the addition property of equality and add 6 to both sides of the equation to get x by itself. This gives you the equation: 2x = 28. Then, use the division property of equality by dividing 2 on both sides of the equation to get x by itself. This gives you the equation: x = 14. Substitute it back in the equation to check.
So I would start this off by plugging in the variables into side B. So if we were to plug 7 into B there would be 22 meters left of the perimeter. Therefore meaning 22 between A and C. Now A is 3 meters shorter than TWICE of B. So 7 times 2 is 14 and 14 minus 3 is 11. now we have 11 and 7 which equals 18. 29 minus 18 giving us 11 left. 11 is C. Now it says c is 4 meters longer than B so it 7 plus 4 is 11. And everything adds up. HOPE THIS HELPS.
I kinda just counted it cant be more than 11 because if u have 4 more than it would be 11+15=26 too much and so is ten (both equations show why there too much) 10 10+14=24. Lets try 8 8+12=20 so your sis has 8 pairs