Three times a certain number decreased by 2 equals to nineteen​

7

Step-by-step explanation:

x equals a certain number

3x - 2 = 19

add 2 both sides

3x=21

divide 3 both sides

x=7

answer: the area of the parallelogram below is 42 square meters.

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the slope of the line is 60

one point on the line is (40,10)

step-by-step explanation:

in the equation outside the parenthesis the equation always tells you the slope. in this case it is 60.

in the parenthesis is also says 40 which is x because it is near the x and 10 is y because it is near y.