PLEASE HELP BRAINLIEST NO SPAM OR REPORR

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Negative 5 1/12 + negative 4 1/4 + 6 3/4

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =