{8x + 9y = −3 ,6x + 7y = 1 What values of x and y satisfy the system of equations

For what value of x does 4x = (1/8) x + 5?

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.

Yvaries inversely as x. y =12 when x=5. find y when x=4