Help guys this ALEKS 6th grade math

What is the definition of exponential decay?

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x