What solution is correct ?
x=

x=400

Step-by-step explanation:

You cannot subtract the 30x from 985 because 985 is not a like term - meaning there is no 'x' attached to 985. Very important - only add/subtract like terms.

So:

30x - 215 = 985

move 215 to the other side because 215 and 985 are similar (they are just regular numbers - no extra variables). To move 215 to the other side you need to perform the same operation to both sides of the equal sign.. that way it cancels out on one side and moves to the other, like so:

(30x - 215)+215 = 985+215

=> 30x = 1200

Now we need to find x, not 30 x, so since 30 is being multiplied by x, to get it the other side we need to divide it out..

(30x)/30 = (1200)/30

x = 400

answer: domain and range mean all possible values of x and y that could be substituted to the inequality. a solution means all possible values that make the inequality statement true. so while the range is still all real numbers, the solution is the shaded area, for which y will always be greater than the line of the function.