Some friends decided to go to the aquarium together. each person pays $7.50. solve 7.5x + 40 = 70 to find how many people

7.5x + 40 = 70

Note the equal sign. What you do to one side, you do to the other. Isolate the x. Do the opposite of PEMDAS.

First subtract 40 from both sides

7.5x + 40 (-40) = 70 (-40)

7.5x = 70 - 40

7.5x = 30

Next, divide 7.5 from both sides

7.5x/7.5 = 30/7.5

x = 30/7.5

x = 4

4 friends are going to the aquarium together

hope this helps

7.5x + 40 (-40) = 70 (-40)

7.5x/7.5 = 30/7.5

Take out 7.5x/7.5

Divide 30 and 7.5 which equals 4

4 people went to the aquarium

I learned this when I went to school... Forgot some steps so correct them!!! :)

the slope of the first function is -3. (3/1)

the slope of the second function is 1. (13-10/6-3).

since |-3| is greater than |1|, the function with the steepest slope is the first.

126 maybe. sorry