The slope-intercept form: y= mx + b
9x - 7y = -7 |subtract 9x from both sides
-7y = -9x - 7 |divide both sides by (-7)
y = 9/7x + 1
So what is the question i didnt get it?
Answer: there are a total of 7 marbles
Step-by-step explanation:
The chance of the first marble being blue is 4/7. Now we only have 6 marbles in the bag (3 red and 3 blue)
The chance of the second marble being blue is 3/6
2x+7=3
move 7 to the other side
sign changes from +7 to -7
2x+7-7= 3-7
2x= 3-7
2x= -4
divide both sides by 2 to get x by itself
2x/2= -4/2
answer:
x= -2
