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:$-\frac{21}{7}$ = x
Sixth, simplify $\frac{21}{7}$ to 3. / Your problem should look like: $-3 = x$
Seventh, switch sides. / Your problem should look like: $x = -3$

Answer: x = -3