(3/5) + (-6/7)+(-2/5)+(3/14) find

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

Pls the last one and it has to be like number 6