The variable, y, varies directly with x. If y = 26 when x = 21,
what is y when x = 64?

y=69

Step-by-step explanation:

first step:when y=26 and x=21

c=y-x

c=26-21

c=5

second step: when y is unknown and x=64

To find y we simply add the value of c to x

y=x+c

y=64+5

y=69

Yes & No it do.

Depends on the topic you're doing.

Step-by-step explanation:

When it comes to liner equations letters are needed to represent the unknown so you be able to fine the answer for the unknown and solve the equation.