1. Add 7 to each side: 18 = 3x
2. Divide each side by 3: 6 = x
3. Shout "Eureka".
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With difficulty not knowing whether or not 7 is plus or minus
If it is -7 then x = 6
3x+4=-11 3x=-15 x=-5
-8
If 3x - 1 = 11: To solve this equation, add 1 to each side of the equation to isolate x (3x -1 +1 = 11 + 1) and now the equation is 3x = 12. The next step is to divide both sides of the equation by 3 to find the value of x (3x / 3 = 12 / 3) for the answer x = 4. Not sure what you mean by x2 x, but you can substitute the value of x (which is 4) to solve.
The discriminant is -11.
No because: 8+3x=x+11+2x (rewrite equation) 8+3x=11+3x (combine like terms) 8=11 (subtract 3x from both sides) This is obviously a false statement, so there is no solution or answer to the equation.