Simplify or solve for x in (X+9) / 2=3

How can you use substitution method to solve a system of equations that does not have a variable with a coefficient of 1 or - 1?

The route used by a certain motorist in commuting to work contains two intersections with traffic signals. The probability that he must stop at the first signal is 0.4, the analogous probability for the second signal is 0.

Round 4,121. to nearest thousand

Anna tossed 3 coins in the air. What is the probability that exactly 2 of the coins show heads? Look back at all of the possible outcomes from #2 and use that to find your probability. Write the probability as a fraction. Simplify, if needed.

Whats the ordered pair 14x-2y=78 and 2x-2y=6 using the substitution method

What property is = x+2-2

A hair dye is made by blending 7% hydrogen peroxide solution and a 4% hydrogen peroxide solution. How many milliliter of each are used to make a 300 mL solution that is 5% hydrogen peroxide?

Explain why a change from 20 to 40 is a 100% increase, but a change from 40 to 20 is a 50% decrease. Increasing 20 to 40 is the same as increasing 20 by c. So, it is a 100% increase. Decreasing 40 to 20 is the same as decreasing 40 by one-half of c.

A train is traveling 3100 miles from New York to California at an average speed of 55 miles per hour after t miles the distance remaining is less than 1200 miles write an inequality to represent the situation

Write the equation in slope intercept form with a slope of - 3 and passes through (1,4)