exam Maths Puzzle Numerical Ability

3x=2y+7
5x=2y+13

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exam Other Question

Could someone please help me with this equation.
Find two consecutive positive integers such that the sum of their squares is 85. please solve this system of equations

2^(5x+y)=0.25^(x-2y+3/2)
log(x-y)=1/log5+log2

find {{{x}}}and {{{y}}}