What value of x makes the equation 4(5-7x)=6-12x

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

Write an equation for the function that includes the points (2,100)and (3,100)