10 - 2n = 30
10 - 2n + 10 = 30 + 10
2n = 40
2n/2 = 40/2
n = 20
Chat with our AI personalities
I'm an orange!
x+30 = 3x-50 x-3x = -50-30 -2x = -80 x = 40
13-3x = 43 -3x = 43-13 -3x = 30 x = -10
you multiply it
x - x2 - 9x + 14 = 0 ; whence, x2 + 8x = 14 , x2 + 8x + 16 = 30 , and x + 4 = ±√30 . Therefore, x = ±√30 - 4 .