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x² + 8x = -3x² + 5 gives us
4x² + 8x - 5 = 0.
This factorises,
(2x - 1)(2x + 5) = 0; whence, either,
2x - 1 = 0, or
2x + 5 = 0;
because, if the product of two numbers is zero, then one or other of them must equal zero.
Therefore,
x² + 8x = -3x² + 5, whenever
x = ½ or x = -2½.
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What is 8x-23 equals 3x plus 2?
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How do you solve 8x plus 6 equals 3x-4?
8x + 6 = 3x - 4 8x = 3x - 4 - 6 8x = 3x - 10 8x - 3x = -10 5x = -10 5x/5 = -10 x = -10/5 x = -2
9x plus 3x-9x equals 6 plus 8x-11?
9x + 3x - 9x = 6 + 8x - 113x = 8x - 11-5x = -11x = 2.2 or 11/5
8x-5 plus 3x plus 17 equals 155 percent x equals?
8x - 5 + 3x + 17 = 155% 11x + 12 = 1.55 11x = 1.55 - 12 = -10.45 x = - (10.45/11) = - 0.95
5x plus 5 equals 8 - 3x?
5x + 5 = 8 -3x 5x = 3 -3x 8x = 3 x = 0.375
7-3x equals 5x plus 13?
0. 7 - 3x = 5x + 13 1. 7 - 8x = 13 2. -8x = 5 3. x = -5/8.
What is (3x plus 5) plus (-8x-10)?
It is equivalent to: 3x+6+5 = 3x+11
How do you write 8x plus 4y equals 5?
8x plus 4y equals 5 is 8x + 4y = 5.
What is the answer to 2x plus 3x-4-8x plus 5?
-3x + 1
What are solutions to the equation x2-3x plus 27 equals 8x-3?
x = 5 or x = 6
-8x plus 5 - 3x equals -6?
-8x + 5 - 3x = -6Combine the 'x' terms on the left side:-11x + 5 = -6Subtract 5 from each side:-11x = -11Divide each side by -11:x = 1
What is 8x-4equlals 3x plus 21?
If: 8x-4 = 3x+21 Then: 8x-3x = 21+4 => 5x = 25 => x = 25/5 Therefore: x = 5
