Question

What is the solution to the equation?

6 + 2s – 8s = 18

A.
s = –4

B.
s = –2

C.
s = 2

D.
s = 4

Answer 1

first try plugging in the numbers for s

Answer 2

Here:
Simplify
6 + 2s + -8s = 18

Combine like terms: 2s + -8s = -6s
6 + -6s = 18

Solve
6 + -6s = 18

Solve for variable 's'.

Move all terms containing s to the left, all other terms to the right.

Add '-6' to each side of the equation.
6 + -6 + -6s = 18 + -6

Combine like terms: 6 + -6 = 0
0 + -6s = 18 + -6
-6s = 18 + -6

Combine like terms: 18 + -6 = 12
-6s = 12

Divide each side by '-6'.
s = -2

Simplify
s = -2

Another way to do it, is to put in one of the answer choices in the equation one at a time in place of 's' - to see which one makes the equation true!

Answer 3

6+2S-8S=18
-6 from both sides
2S-8S=12
add like terms (2S-8S)
-6S=12
Divide -6 from both sides
S=-2

Answer 4

Thank you @mangorox you seem to make me understand everything very well thank you !

Answer 5

If I could I would medal all your guys responses! ^_^

Answer 6

lets try the first one:
6+2(-4)-8(-4)=18

so 2*-4=-8
add 6 to that: 6+(-8)=2

now for 8(-4)= -32

oops nvm @mangorox got it xD