4x - 3 = 2x + 5
4x - 2x = 5 + 3
2x = 8
x = 8/2
x = 4
To check:
4(4) - 3 = 13
2(4) + 5 = 13
How do you solve 2a x 4b equals 192?
To solve for two unknown variables (a and b) you need 2 independent equations. You have only one.
No.
It's a binomial, (whose value happens to be zero no matter what 'x' is).
Can you solve for a variable in an expression or equation?
you can only solve for one in an equation so it can equal something
What is the answer to 15 4 x -5 9?
That will depend on the plus or minus vallues of 15, 4, x and 9 which have not been given
How would you solve sin3x equals sinx?
To start, try breaking down
sin3x using a double angle formula.
Message me if you need more help!
What is factored form of 3x to the 2nd power plus 6x?
x(3x+6) or 3x(x+2). Id recomend the second one.
What is the derivative of half to the power of x?
(1/2)x = 2-x = exp (ln 2-x) = exp( -x ln 2). Since d/dx exp(x) = exp(x), we can use the chain rule to find that:
d/dx (1/2)x = -(ln 2) exp(-x ln 2).
What is limit as x approaches 0 of cos squared x by x?
The limit of cos2(x)/x as x approaches 0 does not exist.
As x approaches 0 from the left, the limit is negative infinity.
As x approaches 0 from the right, the limit is positive infinity.
These two values would have to be equal for a limit to exist.
What type of linear system is 7x plus 2y equals 16 -21x-6y equals 24?
Do you mean 7x+2y = 16 and 21x-6y = 24?
If so then it is simultaneous equation with the solution being: x = 12/7 and y = 2
What is the quadratic for x2-13x plus 40?
Assume this quadratic equation equals zero. Then :-
x2 - 13x + 40 = 0, this can be factored (x - 8)(x - 5) = 0
This holds true when either x - 8 = 0 or x - 5 = 0
When x - 8 = 0 then x = 8 : When x - 5 = 0 then x = 5
Use completing the squares solve 2x2-3x-1 equals 0?
y = 2x2 - 3x - 1 = 0 After graphing this equation on my calculator, I found that there are in fact two answers, but neither of them are integers. This means that it is impossible to factor this quadratic equation in the form (x + a)(x + b) with a and b being integers.