What are these all about?
I really don't understand....
Can somebody please help me??
thanks
1) 4x - 5 = 2x + 7
2) 5y -1 = y + 9
3) 7z - 3 = 11 + 3z
4) t + 8 = 2 - 3t
5) 3p + 2 = 5 - p
6) 5 + 2q = 12 - 3q
7) 8 + a = 5 - 2a
8) 3b - 10 = 5b - 1
9) 3c - 5 = 6 - c
10) 2 + 5d = 7d + 3
11) 2 - 3e = 8 - 6e
12) 4f +11 = 5 + f
2007-09-17 09:15:09 · 5 answers · asked by °♥Amelia Rose♥° 4 in Science & Mathematics ➔ Mathematics
Solve for the variable in each equation. Move all the variables to one side and the numbers to the other.
1) 4x - 2x = 7 + 5
2x = 12
x = 6
4) t + 3t = 2 - 8
4t = -6
t = -3/2
8) 1 - 10 = 5b - 3b
-9 = 2b
b = -2/9
12) 4f - f = 5 - 11
3f = -6
f = -2
Get the idea now?
2007-09-17 09:22:07 · answer #1 · answered by Becky M 4 · 0⤊ 0⤋
these are all equations with unknowns like(x,y,a,t etc) and constants. you have to solve for unknown
ex:
1)
4x - 5 = 2x + 7
group all unknown x terms to left hand side and others to right hand side
subtract 2x and add 5 to each side
4x - 2x - 5 + 5 = 2x - 2x + 7 + 5
2x = 12
divide by 2
x = 12/2 = 6
solve all the remaining problems in the same way
2007-09-17 16:27:36 · answer #2 · answered by mohanrao d 7 · 0⤊ 0⤋
You can add the same thing to both sides of the equation. Solution for problem 1:
4x - 5 = 2x + 7
4x - 5 - 2x = 2x + 7 - 2x (add -2x to both sides to elimiate 2x on the right side)
2x - 5 = 7
2x - 5 + 5 = 7 + 5
2x = 12
x = 6
2007-09-17 16:28:48 · answer #3 · answered by Anonymous · 0⤊ 0⤋
both sides answers equal the same. u r solving for x.
1)4x-5=2x+7
+5 +5
--------------------
4x=2x+12
-2x -2x
----------------
2x=12
/2
x=6
2007-09-17 16:33:01 · answer #4 · answered by amhrsoftball 2 · 0⤊ 0⤋
What did your teacher ask you to do?
They are all linear equations.
.
2007-09-17 16:21:37 · answer #5 · answered by Robert L 7 · 0⤊ 1⤋