<span>Melvina's age is = x, Bettina's age is = 3x
the equation is
x + 20 = 3x - 20
subtract 3x from both sides
-(3x) + x +20 = 3x - 20 - (3x)
-2x + 20 = -20
subtract 20 from both sides
-2x + 20 - (20) = -20 - (20)
-2x = - 40
divide both sides by -2
(-2x)/-2 = (-40)/-2
x = 20
Melvinas age is 20 and Bettinas age is 60</span>
The letter 'C' has 2 lines of symmerty the upper-case 'D' has 2 lines of symmetry the uper -case 'E' has 2 lines of symmetry the upper case 'H' has 2 lines of symmetry the upper case 'I' has 2 lines of symmetry the small case 'L' has 2 lines of symmmetry the letter 'O' has infinite lines of symetry the letter 'x' has 4 lines of symmetry
