exam Maths Puzzle Numerical Ability

WRITE A NUMERICAL EQUATION THAT REPRESENTS EACH STATEMENT

WHEN A NUMBER IS A IS DOUBLED, THE RESULT IS TWELVE

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exam Other Question

Prove the conjecture below by writing a variable statement and using algebra

Conjecture: The sum of five consecutive integers is always divisible by five.

x + (x + 1) + (x + please can you show me a method of how to work out this equation x^2+9x+14=0