exam Maths Puzzle Numerical Ability

The question is: find three consecutive intengers whose sum is 11 less than 5 times the smallest of the three.

I think the equation would be x+y+z=5x-11 but how do I solve it?

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exam Other Question

show that ((( f(x)=3x-4 and g(x)=(x+4)/3 ))) are inverses A ladder 25 ft. long (AD) is leaning against a wall, reaching a point 20 ft. above the ground (CD). The ladder is then moved so that AB= 2(DE). Find BC.