What is 4 times 3,400,573,222

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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

X-10/4 when x = –18 a 7 b –2 c –7 d 2