exam Maths Puzzle Numerical Ability

Having problem with this problem - thanks

2(5x-4)=5(2x+3)

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exam Other Question

2x-3y=7
y=3x-7 substitution equations

i am stuck please help 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 +