Question

Am I right?

Solve for x: 3(x + 1) = -2(x - 1) + 6.

1

4

5

25

Answer 1

I think it's 1.

Answer 2

I wanna make sure I'm doing this right. /:

Answer 3

You are correct :)

Answer 4

@johnweldon1993 ok thanks, can you help me on one more?

Answer 5

Of course :)

Answer 6

A social networking site recorded that 80% of the people who became members of the site one month were between 30 and 40 years old. The equation below represents this information, where x represents the total number of people who became members of the site that month.

x = 0.8x + 72

How many people who became members of the site that month were between 30 and 40 years of age?

112

288

360

432

Answer 7

Alright so that equation gives us how many were between 30 and 40...so we jut need to solve that for 'x'

x = 0.8x + 72

Combine like terms...subtract 0.8x from both sides of the equation

x - 0.8x = 72

.2x = 72

x = (72/.2)

Answer 8

Sorry, I'm terrible at this lol but where did the .2x come from?

Answer 9

No dont worry about it :)

so we had

x - 0.8x = 72

Well

1x - 0.8x = (1 - 0.8)x 1 - 0.8 = 0.2 right?

Answer 10

ohhh ok my bad

Answer 11

Ok I get it now thanks so much (: @johnweldon1993

Answer 12

Of course :)