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What number am I?
I like to move it move it!
Solve for the unknown variable
Rearrange, substitute, solve! OH MY!
100
2(x+1)
2x+2
100
You add 5 to me to get 7
2
100
Simplify y + 6y = 3+4
7y = 7?
100
x - 6 = 14
20
100
x+y = 10, when x = 3
y = 7
200
-3(2x - 5)
-6x + 15
200
you subtract 3 from me to get 9
12
200
Move and simplify. 2x - 5 = 3x
x = -5?
200
3 = 8 - x
5
200
V = lwh, when V = 20, l = 2, h = 5
w = 2
300
3(x - 5) = -2(x+1)
3x - 15 = -2x - 2
300
15 is 3 times bigger than me.
5
300
Move and simplify. 4x - 5 = 2x +7
2x = 12?
300
5x = 45
x = 9
300
P = 2(L+W), when L = 3 and P = 16
W = 5
400
-(x - 1) = -2(3+x)
-x + 1 = -6 - 2x
400
I am four times bigger than 6.
24
400
Expand, Move, Simplify. 2(5x - 4) = 3x + 6
7x = 14
400
2x - 3 = 4x + 7
x = -5
400
m = 2n - 5 when m = 13
n = 9
500
3(x - 2) - (2x +4) = 4(x - 3)
3x - 6 - 2x - 4 = 4x - 12
500
If you add 3 to me and multiply me by 4, you will get 28
4
500
3(2x - 1) = 4(2+3x)
-6x = 11 or 6x = -11
500
2(2x + 3) = 3x + 1
x = -5
500
x = 2z - 5 +y when x = 9 and y = 6
z = 4