(-5) what is the deal with this?
What do I do?
2007-11-04 12:46:11 · 7 answers · asked by Jon J 2 in Science & Mathematics ➔ Mathematics
16x + 7 - 5x = 8 + 5x + 23
6x = 24
x = 4
2007-11-04 20:38:19 · answer #1 · answered by Como 7 · 1⤊ 1⤋
Thanks for a very simple question. Follow my step below.
Firstly, given the equation:
4(3x + x) + 7 - 5x = 8 + (-5)(5x - 6x) + 23
Then, we calculate the expression in the brackets:
4(4x) + 7 - 5x = 8 + (-5)(-x) + 23
Next, we solve the equation:
16x + 7 - 5x = 8 + 5x + 23
We move the value from right hand side into the left hand side:
16x + 7 - 5x - 8 - 5x - 23 = 0
Lastly, we calculate overall equation:
16x + 7 - 5x - 8 - 5x - 23 = 0
16x - 5x - 5x + 7 - 8 - 23 = 0
6x - 24 = 0
6x = 24
x = 24 ÷ 6
x = 4
Therefore, the answer is x = 4
(-5) is just negative five, so, you can't multiply with (5x - 6x) but you can multiply with (-1). My advice; calculate the expression in the bracket first!
I hope you got the best answer for your question. Have a nice day!
2007-11-04 13:05:25 · answer #2 · answered by Nizam89 3 · 0⤊ 0⤋
4(3x+x)+7-5x=8+(-5)(5x-6x)+23 Multiply the numbers into the parentheses equation first (12x+4x)+7-5x=8+(-25x+30x)+23 Do the maths interior the parenthese next (16x)+7-5x=8+(5x)+23 upload like variables....16x and -5x is 11x....8 plus 23 is 31 11x+7=(5x)+31 subtract the seven from the two factors to eliminate it on the nicely suited element as nicely as subtracting the 5 to get the x's on the different element of the equation. 6x=24 then divide 6 into 6x and 24 x=4 your left with x=4
2016-10-15 01:35:19 · answer #3 · answered by benedick 4 · 0⤊ 0⤋
It's a negative five, and you multiply it with (5x-6x). The parentheses are there so there isn't a + right next to a -, which might look like a typo. There's nothing wrong with writing it as 8+-5(5x-6x) + 23.
2007-11-04 12:54:39 · answer #4 · answered by DWRead 7 · 0⤊ 1⤋
(-5) is just negative five. It simplifies to
= 8 - 5(5x - 6x) + 23
= 8 - 5(-x) + 23
= 8 + 5x +23
= 5x + 31
They're just getting tricky with the signs.
2007-11-04 12:53:25 · answer #5 · answered by pandion317 2 · 0⤊ 1⤋
simplify:
multiply the 4 by (3x+x):
12x+4x+7-5x=8+ (-5) (5x-6x) +23
using PEMDAS (parenthesis, exponents, multiplication-
division, addition-subraction), simplify (5x-6x) by subtraction
and simplify (-5) by opening the parenthesis to equal -5:
12x+4x+7-5x = 8-5 X (-x) +23
then, you multiply:
12x+4x+7-5x=8+5x+23
then, simplify your x terms and your integers:
6x+7=8+23
6x=24
now, divide both sides by 6:
x=4
TAH-DAH!
here's your answer
2007-11-04 13:01:31 · answer #6 · answered by Anonymous · 0⤊ 1⤋
12x + 4x + 7 - 5x = 8 -25x + 30x + 23
11x + 7 = 5x + 31
6x = 24
x = 4
The (-5) just means multiply the other () by -5
2007-11-04 12:48:57 · answer #7 · answered by Ms. Exxclusive 5 · 0⤊ 1⤋