15 points: can someone help me with this thank you. (all separate equations)

solve for y: 6x+3y=12

solve for k: 2p-k=3

solve for w: 6v-2w=10

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

Is the figure congruent? yes or no?

Atemperature of 1.64◦f corresponds to answer in units of ◦c.