exam Maths Puzzle Numerical Ability

-8=-(x+4) [ditribute negative into the ()]
-8=-x-4
-8+4=-x-4+4 [add 4 on both sides]
-4=x
x=-4

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if the sides of a square are decreased by 2cm, the area is decreased by 36cm^2 how would i get the dimensions of the original square? This is the first problem x+4>5 or x+4<-2 The next problem is Find three consecutive integers such that the sum of the first and third is -38 I am so thankful that I have found you. You are a blessing