Question

8x-3=15x+18
a. x=-3
b. x=3
c. x=2.1
d. x=0.9

Answer 1

8x - 3 = 15x + 18

First, subtract 8x from both sides. / Your problem should look like:
`-3 = 15x + 18 - 8x`
Second, simplify 15x + 18 - 8x to 7x + 18. / Your problem should look like:
`-3 = 7x + 18`
Third, subtract 18 from both sides. / Your problem should look like:
`-3 - 18 = 7x`
Fourth, subtract -3 - 18 to get -21. / Your problem should look like:
`-21 = 7x`
Fifth, divide both sides by 7. / Your problem should look like:
`-(21)/(7)` = x
Sixth, simplify
`(21)/(7)` to 3. / Your problem should look like:
`-3 = x`
Seventh, switch sides. / Your problem should look like:
`x = -3`

Answer: x = -3