Please help! Number 7 and 8 don't forget to put the graph points thank you!

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

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.