exam Maths Puzzle Numerical Ability

one side of a triangle is twice the shortest side. the third side is 4 feet more than the shortest side. the perimeter is 20 feet. find all three sides.

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exam Other Question

my problem was 4(2x-3)+8(x-4)=2x+6 and the answer that i got was 5.6 how would that be in a fraction? Solve the inequality.

r - 12 < 7 Here are the choices.

1.) r < -5
2.) r > -5
3.) r > 19
4.) r < 19

Please HELP !!!!!