If: 3x = 15 Then: x = 5
If: 3x = 45 Then: x = 15
If you mean: x^2+15-3x then its value is 19 when x equals 4
3x = 15 >> 3x = multiplication, and the opposite of multiplication is division. So you take 3x, draw a line under it to show division, then write 3. After that, cross out the 3x/3. With algebra what you do to one side, you do to the other, so then you take 3 and divide it by 15. >>the answer>> X=5
Get in slope intercept form. 3X + 5Y = 15 5Y = -3X + 15 Y = -3/5X + 3 -3/5 is the slope of this line and the line parallel to this line
If: 3x = 15 Then: x = 5
y = 15 (by transitivity)
15=30-3x 15-30=3x -15=3x -15/3=x -5=x
3x-6=21-6=15
no
If: 3x = 45 Then: x = 15
3x+12x = 15 15x = 15 x = 1
-3x=-15+6 -3x=-9 x=-9/-3 x=3
3x - 5 = -15 so 3x = -15+5 so 3x = 10 x = 10 over 3
If: -3x = 15 Then: x = -5 Because: -3 times -5 = 15
4x+7-3x = 15 4x-3x = 15-7 x = 8
(3x - 9 =15) +9 = 3x=(24)/3 = x=8 x=8