Why does the equation 7x + 13x - 5 - 15 = -10 - 10 + 14x + 6x have an infinite number of solutions? because if you add 20x to both sides of the equation and simplify, you get - 20 = -20
A
B
because if you add 20x to both sides of the equation and simplify, you get —20 = 0
С
because if you subtract 20x from both sides of the equation and simplify, you get — 20 = –20
D
because if you subtract 20x from both sides of the equation and simplify, you get -20 = 0