Complete the solution of the equation. find the value of y when x equals -13. -4x + 5y = 12

If x equals -13 then..
-4(-13)+5y=12
52+5y=12
5y=-40
y=-8

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.