Question

What is the solution of 2(x - 5) + 4 = 30?

Answer 1

multiply the 2 inside the the parenthesis first. 2*x and 2*(-5). And then add those. What do you get?

Answer 2

2x+-10??????????/

Answer 3

Yes! When you add a negative, you can just say the same thing as subtracting. So, 2x-10! Awesome. So, we still have that +4 though so we tag it on too. 2x-10+4. What's -10+4?

Answer 4

-6

Answer 5

yup! so now it's just, 2x-6 = 30. So we need to solve for x. What do you think we should do to both sides first?

Answer 6

add 6

Answer 7

Yes! Great. So, 2x-6+6 = 30 + 6, right? so, 2x = 36. Now what? ^^

Answer 8

divide 2 on both sides

Answer 9

yes! . x = 36/2 = ?

Answer 10

x=6

Answer 11

mmm, that'd be if it was 36/6, but it's 36/2 actually :P

Answer 12

WAIT DUH ITS 18

Answer 13

mhm! x = 18 :D

Answer 14

Tysm lmao

Answer 15

The great thing is, you can test it. Plug x = 18 back into the very first equation ;P

Answer 16

See what you get. 2(18-5) + 4 = 30?

Answer 17

2(13) + 4 = 30
26 + 4 = 30
~ 30 = 30 ~

Answer 18

thank you

Answer 19

no problem!