0
-3x - 1 = 20 + 4x
1) the first thing you want to do is have the variable(x) in one side of the equation. so subtract so add -3x to 4x.
-1 = 20 + 7x
2) now you want to isolate the variable so subtract 20 to -1.
-21 = 7x
3) to solve for x you need to divide by 7 on both sides and 7x divided by 7 is one or just x and whatever you do to one side you must do to the other -21 divided by 7 is -3
x = -3
Add your answer:
Earn +20 pts
Solve x plus 5y equals 20 for y?
(20 - x)/5
How do you solve math problem18 equals -a plus 2?
20
How do you solve x plus 13 over 20?
To solve for x, we'd have to know what this expression equals.
Solve by the method of elimination 2x plus 3y equals 40 3x plus 2y equals 20?
y=16 x= -4
Solve -7m plus 20 equals -17m-10?
-7m + 20 = -17m - 1010m = -30m = -3
How do you solve 8-3x equals the square root of 4xsquared plus the square root of 20 plus 8?
68
How do you solve negative 3x plus 5 equals 20?
-3x + 5 = 20 -3x = 15 x = -5
How do you solve the equation cos2x plus 20 equals negative half?
Better formatting is cos(2x+20)=-0.5
What numbers equals 20 and what times what is 20?
20 = 400
50 plus what equals 180?
To solve this one, subtract 50 from 180 and you'll have your answer.
How do you solve 3X plus 6 equals x plus 20?
balance the equation 3x-x=20-6 3x-x=2x 20-6=14 2x=14 x=7
How do you solve 3x2 plus 20 equals 0?
3x^2=-20 so x^2=-20/3 this has no real roots but the plus of minus i(square root of 20/3) is a solution if we allow complex numbers.
