Solve for the variable

10

Step-by-step explanation:

First, multiply everything in the parentheses.

Next, subtract 21x from both sides to get all the variables on one side.

Next, add 16 to both sides to get all the real numbers on one side

Finally, divide both sides by 30 so we can get the variable by it's self

answer: about 22.67

step-by-step explanation:

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is