5
If 40 plus x equals 25 then x is equal to -15.
x + 3x = 40 4x = 40 x = 10.
x=6=x=5+x=13+x=20 x cannot = x+5. This question has no answer.
x=34
x = 15
10 + x = 50x = 40
x = 5
If its x+4x+5 then: 5x+5
x+4x+5=5x+5
x2 + 13x + 40 = x2 + 5x + 8x + 40 = x(x + 5) + 8(x + 5) = (x + 8)(x + 5)
X= 5