2(x + 2) = 4
The sum of a number and –6 is 9. Find the number.
8 – (4x – 3) = 19
2006-10-01 15:45:53 · 6 answers · asked by Sherrie M 1 in Education & Reference ➔ Homework Help
(1)
2(x + 2) = 4 . . use distributive prop.
2x + 4 = 4 . . subtract 4 from both sides
2x = 0 . . divide by 2 on both sides
x = 0
(2)
x + (-6) = 9 . . . subtract (-6) from both sides
x = 15
(3)
8 - (4x - 3) = 19 . . use distributive prop. since there is a minus sign in front of the parentheses, it is the same as multiplying everything inside the parentheses by -1.
8 - 4x + 3 = 19 . . combine like terms
-4x + 11 = 19 . . subtract 11 from both sides
-4x = 8 . . . divide by -4
x = -2
2006-10-01 15:47:48 · answer #1 · answered by ♥LoisLane♥ 4 · 0⤊ 0⤋
The number is 15. 15 + -6 is 9.
2006-10-01 22:48:01 · answer #2 · answered by LaCosaMasBella 3 · 0⤊ 0⤋
15
2006-10-01 22:48:49 · answer #3 · answered by DeLovelyEmma 1 · 0⤊ 0⤋
2(x + 2) = 4
Multiply by 4 on the left side and divide by 8 on the right. When you do that, you get:
14(x + 2) = 1/2
Now divide by 14 on the left and multiply by 4 on the right. When you do that you get:
x + 2 = 2
This means x = -4
The second one was too hard. I couldn't figure it out. So was the third problem.
Hope that helped :-)
2006-10-01 22:50:59 · answer #4 · answered by Gypsy Catcher 3 · 0⤊ 1⤋
2(x + 2) = 4
2x + 4 = 4
2x - 4 = 4-4
2x = 0
x = 0
n + -6 = 9
n +6 = 9 + 6
n = 15
8 - (4x -3) = 19
8 -4x+3 = 19
-4x + 11 = 19
-4x = 8
x = -2
2006-10-01 22:55:10 · answer #5 · answered by Amanda H 1 · 0⤊ 0⤋
on the first one x=2
2006-10-01 22:47:49 · answer #6 · answered by ya girl 4 · 0⤊ 1⤋